Chapter 1: Even in Our New Life, Her Possessiveness Is Dead-Heavy
The entrance ceremony concluded without a hitch, and Yuu moved to his classroom.
Sitting at his desk waiting for the homeroom teacher to arrive, Yuu rehearsed his self-introduction in his head.
(Should I aim for a laugh, or just keep it safe and unmemorable...?)
His conviction that the beginning was vital only made him more anxious, giving him a creeping feeling that he was bound to fall flat on his face.
Looking around, Yuu spotted several familiar faces, including Takami and Aoi. Even if they were scary girls normally, in moments like this, their presence brought a comforting familiarity.
(Chuujou-san, who’s usually terrifying, actually looks dependable right now. Does she somehow look like a pretty girl too? Nah, must be an optical illusion.)
She had been a pretty girl all along; Yuu’s eyes were simply clouded.
Rattle, rattle, rattle—
The classroom door slid open, and the homeroom teachers entered.
Two women stepped inside. The first was a female teacher with a pleasantly plump figure suited to plain glasses. And the other was the newly appointed teacher radiating an absurdly lewd aura of pheromones. To Yuu, she was none other than his all-powerful older sister.
“““Whoaaaaaaa!”””
The second Yurika stepped into the classroom, the male students erupted into a chorus of victorious roars. Some pumped their fists; others threw their heads back toward the heavens. As an added bonus, the girls watching this gave them cold, half-lidded glares.
Even during the introductory speeches after the ceremony, the student body had gone wild only when Yurika was introduced. With such a breathtakingly beautiful teacher joining the school, it was only natural for every boy to hope she would be assigned to his homeroom.
“U-Um, please settle down...”
The plain, bespectacled teacher—Hanako—tried to calm them, but the classroom remained in an uproar.
Unable to just watch Hanako struggle, Yurika raised her voice.
“Silence! Your homeroom teacher is about to speak!”
With a single shout from Yurika, whose devilish charm commanded total authority, the raucous students instantly fell silent.
Before her massive bust that seemed to defy gravity as it pushed against fabric, everyone was stricken with awe. Several boys, completely overwhelmed by her stimulating cleavage and voluptuous hips, doubled over in their seats—as if prostrating themselves.
Witnessing this, Hanako once again beamed with an envious gaze.
“M-Masteeer~”
As Hanako edged closer with shining eyes, Yurika averted her face, looking slightly uncomfortable.
“U-Um, I am not your Master. I’m your junior colleague. Please continue speaking.”
Urged on by Yurika, Hanako resumed.
“Um, I am Suetsumu Hanako, and I will be serving as your homeroom teacher for this year. I l-look forward to workin’ with yoo...”
Overcome with nerves, Hanako tripped over her words at the very end. The clumsy manner was somewhat endearing, prompting lighthearted teasing from the students.
In truth, this twenty-eight-year-old, boyfriend-less Suetsumu Hanako considered herself an unpopular, gloomy nerd, yet she was surprisingly popular among the students. There was a dedicated demographic that had an immense appreciation for plump, plain, busty girls with glasses. Hanako herself, however, simply became depressed, assuming she was merely being ridiculed.
Undaunted, Hanako pushed on.
“And this is Akashi-sensei, who was appointed as your assistant homeroom teacher starting this year. Ah, go ahead.”
Introduced by Hanako, Yurika stepped forward.
Yurika prepared to give her greeting as the new teacher, but with her beloved Yuu directly in her field of vision, she had to exercise every ounce of willpower to stop herself from leaping at him and smothering him with kisses right then and there.
Of all things, she had been assigned to Yuu’s class. Despite having sworn to mind her professional boundaries, she was already on the verge of letting her true nature show.
“—and so, I look forward to working with all of you for the upcoming year.”
The moment her greeting ended, the room erupted into chaos again, with questions flying across the room: “Do you have a boyfriend?!” and “What’s your type in men?!”
Yurika deftly ignored every question, advancing the agenda with crisp businesslike detachment—a complete cold shoulder. She possessed zero interest in any male other than Yuu.
“Now then, let us move on to your self-introductions.”
With that, Yurika steered the class into introductions.
They started with the girls in Japanese alphabetical order, then looped back to the boys from the end of the roster.
One by one, the students stepped up to the front to introduce themselves, until finally it was Yuu’s turn. Yuu climbed onto the podium and began his introduction beside Yurika, who stood before the teacher’s lectern.
“I’m Akashi Yuu. I look forward to this year.”
Though he had run countless simulations in his head, his introduction was extremely concise. Rather than clumsily reaching for laughs, he had chosen the path of least risk.
However, his classmates seemed focused on an entirely different matter.
“Wait, Akashi? Are you related to Akashi-sensei?”
A boy threw out the question.
(Ugh... I knew this was coming. No way to hide it now...)
Yuu braced himself.
“We’re siblings.”
“““Whoaaaaaaa!”””
Cheers erupted across the classroom. Despite wanting nothing more than to fly under the radar, Yuu had become the center of attention.
Clatter! Clack-clack-clack!
Just as Yuu turned to head back to his seat, his sleeve caught a piece of chalk on the blackboard ledge, sending it tumbling to the floor. He quickly crouched down to retrieve it.
“Akashi-kun, please clean that up.”
Having instructed Yuu, Yurika moved on to explaining the upcoming schedule.
(Damn it, having everyone stare at me totally threw me off.)
From his crouched position, Yurika’s legs standing before the lectern were right in front of his eyes.
For a moment, he was captivated by the shapely legs sheathed in black stockings, but knowing better than to entertain indecent thoughts in a classroom, he silently continued gathering the broken chalk.
Glancing up, he noticed chalk dust smeared across Yurika’s voluptuous backside.
(This is bad... Onee-chan’s skirt got dirty...)
Without thinking, Yuu tried to brush the stain off his sister’s skirt.
“Following this, you will submit various documents and receive your textbooks, teaching materials, and PE gear—hyah!”
Yurika suddenly let out a sharp gasp.
“Ngh! I-It’s nothing. Continuing on—”
Yuu was rubbing Yurika’s bottom, caressing it back and forth as he earnestly tried to wipe off the chalk dust.
Hidden behind the lectern, this was completely invisible to everyone else in the room.
Rub, rub, rub! Pat, pat, pat!
“The distribution will be—ah!♡ In the first-floor lobby, n-aah!♡ T-Tables have been set up—haahn!♡”
Her face flushed with arousal, Yurika let out sultry, breathless sighs. Her brow occasionally furrowed, twisting into an expression of sweet agony.
Enduring the waves of pleasure welling up from within, Yurika desperately tried to continue her instructions. As her body twitched, she radiated such thick pheromones that it felt as if the entire classroom were being tinted pink.
Murmur, murmur, murmur...
Her overwhelming sexiness stirred strange sensations not only in the boys, but among the girls as well. It was as though she genuinely possessed a succubus’s aphrodisiac skill.
With Yuu stroking her rear, Yurika was on the verge of falling apart right in public.
(Y-Y-Y-Y-Y-Yuu-kun! Why are you stroking my butt?! Ah!♡ No! In front of everyone...!)
Yurika’s hips twitched in small spasms as an intense wave of euphoria assaulted her lower half.
(Hngh!♡ I-It feels too good~! Yuu-kun, you meanie! Is this revenge because Onee-chan is always sneaking into your bed at night? Doing something so naughty in a place like this is way too cruel!)
Right as Yurika was on the verge of total collapse, Yuu was feeling thoroughly satisfied that the chalk stain was gone.
(All right, Onee-chan’s skirt is clean again.)
Having finished collecting all the chalk pieces, Yuu brushed the dust from his hands and prepared to return to his seat. Only then did he finally notice his sister acting strange.
“Huh? Onee... Sensei, are you feeling unwell?”
“I-I’m fine. Nngh!♡ H-Hurry up and return to your seat...”
“Yes, ma’am.”
Once Yuu was back at his desk, Yurika wrapped up her announcements and stepped away from the lectern, tagging in Hanako, who had been waiting against the wall.
“M-Master... are you all right?”
Hanako voiced her concern.
Though Yurika put on a brave front, her hips were still trembling softly.
“I-I apologize. Ah!♡ P-Perhaps I’m just a little tired. Also, I am not your Master.”
Holding up a hand to steady Hanako, Yurika straightened her posture, never forgetting to reject the title of “Master.”
Hanako, deeply worried about Yurika’s health, looked frantically around the room.
“U-Um, could someone please escort her to the infirmary?”
“““Me! Pick me! Me!”””
At Hanako’s call, the boys clamored in unison, eager to claim the grand honor of escorting their dream teacher to the nurse’s office.
Perhaps these boys, completely enamored with Yurika, were clamoring to enlist in the Holy Yurika Knights. Not that they ever could, since Yuu was the sole member.
“Hey, you boys!”
“You’re totally thinking perverted things, aren’t you?!”
“Disgusting!”
Naturally, the girls voiced their outrage.
“Yuu! You’re her brother, so take your sister there!”
Amid the uproar, Takami called out to Yuu.
“Yeah, I’ll take her.”
Yuu was already moving before he even finished speaking. Under no circumstances would he ever let another boy touch his sister’s body.
“Here, Onee... Sensei, hold on to me.”
“Y-Yes. Yu... Akashi-kun. Suetsumu-sensei, I’ll leave the rest to you.”
Hanako puffed out her chest proudly.
“Leave it to me, Master!”
“Thank you. And again, I am not your Master.”
Cutting the exchange short, Yuu supported Yurika as they left the classroom, bathed in the jealous, covetous glares of the male students burning into his back.
Entering the infirmary, Yuu helped the flushed Yurika lie down on the bed.
The school nurse was reportedly out on an errand, leaving only Yuu and Yurika in the room. Just like that, they found themselves completely alone together in the school infirmary.
“Onee-chan... wait, no. Sensei, are you okay?”
When Yuu spoke, Yurika’s pouting face closed the distance between them in an instant.
“Yuu-kun, that was so mean~! Caressing my butt in a place like that! Was that public humiliation play?! Classroom discipline training?! Public exhibitionism play?! Save that kind of stuff for home~!”
Pressing her body tightly against his, Yurika playfully pummeled his chest with both fists.
“Whoa, too close! You’re way too close! Get off me!”
“Yuu-kun, you bully~!”
“You’ve got it all wrong! The chalk dust was—”
Once Yuu explained the circumstances, the misunderstanding was cleared up, but Yurika’s indignation at having been brought to the brink of climax in front of a whole room of students refused to subside.
While Yuu’s touch had inadvertently been rather sensual, the core issue was that Yurika was simply hypersensitive. The barest touch from Yuu caused her body to react uncontrollably. Because she loved Yuu to an absurd degree, even the slightest contact sent her straight to seventh heaven.
“Geez, Yuu-kun, you pervert.”
Though Yurika puffed her cheeks in a huff, Yuu couldn’t help but reaffirm to himself: (Yep, my sister is cute even when she’s mad.)
“At any rate, no flirting at school. You’re the one who made that rule, Onee-chan.”
“Uuu... but you were the one who...”
She seemed to have more complaints to air, but recalling her duty as a teacher, she switched back into Yurika-sensei mode.
“Akashi-kun! It seems you require strict discipline. Expect a harsh punishment once we get home!”
Tremble, tremble, tremble!
Yuu shivered as he imagined tonight’s punishment. He was already barely holding on by a thread against his lewd sister’s frequent nighttime bed raids; if she subjected him to any more erotic assaults, his body wouldn’t survive.
“Damn it, that’s so unfair...”
“We are returning to the classroom now.”
Yurika led the way out of the infirmary.
The truth was, her body was throbbing incessantly from Yuu caressing her bottom, and resting in the infirmary only made her longing swell further. Just looking at Yuu made illicit desires surge up thick and heavy from deep within her.
“Nn... chu♡”
Yurika smacked her luscious lips with a sensual sound, gazing fixedly at Yuu. That alone sent a jolt like an electric current coursing through Yuu’s body.
(Guh, I’ve completely stoked Onee-chan’s motivation to ravish me... What’s going to happen to me when we get home?! I’ve got a terrible feeling this is going to be horrifying!)
Exuding pheromones from head to toe, Yurika showered Yuu in her smoldering gaze.
Imagining tonight’s punishment, Yuu returned to the classroom, his knees trembling with shivers of dread and anticipation.
With the day's entrance ceremony schedule finished, all that remained was to head home. However, Yuu found himself surrounded by classmates.
Everyone was dying to hear about Yurika, bombarding Yuu with a barrage of questions. For an introvert like Yuu, this was a thoroughly distressing situation.
“What’s Akashi-sensei like at home?”
“Does she have a boyfriend?”
“What does she wear to bed?”
“What’s her bust measurement?!”
Questions bordering on sexual harassment were already flying.
“N-No, she’s just an ordinary older sister...”
Yuu was growing rather exasperated with his classmates prying into every single detail.
(Stop looking at my big sister with dirty eyes.)
Thanks to his sister, he had unexpectedly become popular, and his high school debut seemed technically successful on the surface. Yet he could not stomach other guys eyeing his precious sister with lust.
Though, in all fairness, Yuu shared some blame for having rubbed Yurika’s butt earlier.
“Hey, Yuu!”
Takami pushed her way into the circle.
Possessing great social skills and natural popularity, Takami had already established herself as one of the central figures of the class.
“Come on, boys. Ask her yourself if you want to know. Can’t you see Yuu is uncomfortable?”
“Chuujou-san...”
Takami, who always teased and pestered him, looked practically like a savior right now.
“Yuu’s sister is super strict and terrifying. Ever since we were little, whenever Yuu misbehaved, she’d scold him and even put him in pro-wrestling holds!”
“““Hahahahaha!”””
Takami’s anecdote, sounding like a punchline, drew hearty laughs from the crowd.
(Chuujou-san... please keep that a secret. Hearing about pro-wrestling holds just reminds me of those erotic punishments...)
As Yuu recalled those "adult wrestling" sessions, it seemed every adolescent boy’s imagination traveled down the exact same road.
“If she’s that gorgeous, I’d love to get locked in a wrestling hold by her!”
“Her boobs would be pressing against you the entire time!”
“Man, I wanna be squeezed between those thighs~!”
This predictable development immediately stoked Yuu’s possessive instincts.
(Damn it, they really are staring at her with dirty thoughts! I’m never handing my Onee-chan over to anyone!)
He wanted to snap at them, but kept quiet so as not to out himself as a rabid siscon.
Above all else, he didn't want to give his sister to anyone, didn't want anyone else touching her, and wanted her smiles directed solely at him. The feelings for Yurika that had accumulated since childhood dominated Yuu’s heart to a dizzying, near-frenzied degree.
Once the surrounding boys dispersed, Takami leaned in close to Yuu’s face.
“Hey, Yuu. Since it’s our entrance day and all, let’s all go to karaoke together.”
A sudden extroverted invitation. This had clearly been her real goal all along.
“Haha, Chuujou-san. Hanging out with the class right off the bat on the first day—what are we, normies? Very funny joke.”
Yuu spread his hands with a weary, good-grief shrug.
“I just want to go home early.”
“You always want to go straight home! What, are you rushing off to watch some dirty anime—”
“Shhh! Keep that quiet!”
Flustered, Yuu hastily silenced her.
“You’re coming too!”
“So it’s mandatory...?”
Thanks to Takami’s proposal, a group trip to karaoke was officially decided.
As Takami gathered participants, classmates flocked over one after another. Naturally, Aoi joined the circle as well—almost as if she had been waiting for the chance.
(Ugh, an ordeal testing my social skills right at the start of high school...)
For a fleeting moment, Yuu had viewed Takami as his savior, but she was simply the same old Takami after all.
Upon arriving at the karaoke box, Yuu found himself in a state of nervous tension entirely unrelated to singing. For some reason, the girl sitting right next to him was a gyaru.
“Hey, aren’t you gonna sing?”
The gyaru beside him peered into Yuu’s face.
Yuugiri Maria. With hair dyed blonde and her uniform worn loosely, she carried a playful, mischievous vibe. Her skirt was rolled up at the waist, daringly exposing plenty of thigh.
Looking closely, she had a cute face, but her intimidating aura took precedence, leaving Yuu thoroughly ill at ease. Then again, Yuu was generally bad with women who weren't his sister anyway.
“Uh, I-I’m fine waiting for later...”
When the nervous Yuu answered, Maria’s lips curled into a smirk.
“Hmm, is that so?”
“Yeah.”
Sitting directly across from them, Takami glared at the scene with a terrifying scowl. While bickering with Aoi as usual, she had lost her designated seat next to Yuu to Maria.
Thus, Yuu was trapped in dire straits: a flashy gyaru like Maria beside him and a furious Takami right in front of him, pinned down by the gazes of two frightening women.
(Guh, how did it come to this? I’m already stressed enough having to attend a normie event on my first day of high school, and now I’ve got a scary gyaru sitting right next to me on our first meeting. What am I even supposed to say...?)
“Are you nervous by any chance?”
Maria peered into Yuu’s face, grinning teasingly.
“N-No, not really...”
Seeing Yuu’s reaction, Maria took on a mischievous, devilish smirk, as if she had just stumbled across an amusing new toy.
“Heheh, why are you acting so fidgety?”
“H-Huh? I’m not acting fidgety.”
“Say, Akashi, you’re a virgin, aren’t you?”
Gasp!
“Ah, bingo! That’s hilarious!”
It seemed she found it endlessly entertaining that Yuu jumped every time she spoke to him.
Despite kissing his older sister constantly, he had zero suave aura around women. He was unmistakably projecting the unmistakable vibe of a virgin.
(It’s not hilarious! What’s with this girl? She’s outrageous for someone I just met! Society loves the "gyaru who’s kind to otaku" trope, but this gyaru is brutal to otaku! I knew it—gyarus being nice to otaku only exists in 2D fiction...)
Yuu had learned a lesson today: he liked gyarus, but strictly 2D ones.
“Come to think of it, Akashi, have you ever kissed anyone?”
“Ugh...”
The moment Yuu hesitated, Maria let out a soft chuckle.
“Heheh, so you haven't. Then how about it—wanna let me give you your first kiss?”
“What?”
“Kiddiiiing~”
As Maria bantered and poked fun at him, Yuu’s expression soured.
(Damn it, she’s completely making fun of me. Even though I actually have kissed someone...)
Growing hot under the collar, Yuu inadvertently let his tongue slip.
“For the record... I have kissed someone before.”
“Huh? Haaah?! For real?! With who?!”
Caught completely off guard, Maria did a double take at Yuu.
(Crap! I let her provoke me into saying something stupid!)
Regret came too late. Maria’s face was glowing with boundless curiosity.
“Who’d you do it with? Come on, spill!”
“I said it’s a secret.”
“Don’t hold out on me! Tell meee!”
“I told you, it’s a secret.”
Leaning her shoulder against Yuu, Maria suddenly caught sight of the girl glaring daggers from across the table.
“Heh... I see how it is.”
Maria shot a quick glance at Takami and gave a knowing nod, as if thinking “Hmph, so that's the story.” She had jumped to her own mistaken conclusion.
Meanwhile, Takami was in an exceptionally foul mood.
Not only had her spot next to Yuu been stolen by Maria, but the two of them were whispering intimately to each other. On top of that, one of the boys was belting out a song at the top of his lungs, making it impossible to hear what they were saying. Maria’s meaningful glances across the table only aggravated her further.
(What is her deal?! Clinging all over my Yuu! And she keeps glancing at my face while whispering things!)
Takami felt an incomprehensible frustration swirling inside her.
(I-It’s not like I care who Yuu gets along with, but...! Still, I’ve been looking after him ever since middle school! Flirting with another girl without my permission is completely unforgivable!)
Despite not even dating him, Takami was pulling an inexplicable girlfriend act. She seemed entirely unaware of it herself, however.
And then, the moment arrived.
When the turn came for the boy sitting on Yuu’s other side to sing, Takami made her move without hesitation. Seizing the exact moment the seat beside Yuu emptied, she swooped in. The instant she sat down, she glared at Yuu and Maria with sheer, wordless pressure.
G-G-G-Guh...
Sandwiched between two terrifying girls on either side, Yuu felt half-dead.
To an outside observer, it might look like "a flower in each hand" or a bona fide harem, but to Yuu himself, he felt like an otaku being shaken down by delinquents. Once again, he was thoroughly breaking every classmate romantic flag in his path.
“Chuujou-san, are you angry about something?”
“I-I’m not angry at all!”
She was unquestionably, thoroughly furious.
“Hey, Akashi~. Wanna sip of my cola?”
Seeing this, Maria pressed even closer to him in open provocation.
Naturally, Takami wasn't about to stay silent.
“Yuu is drinking mine!”
“I’m not drinking either.”
With both girls pressing firmly against him from either side, Yuu was completely immobilized.
Fighting over Yuu, the two strong-willed girls began throwing sparks without giving an inch. They were just like wild carnivores baring their fangs to keep the other from snatching their prey.
And at this moment, Yuu had no idea that his careless remark about kissing would later stir up an unimaginable tempest.
Incidentally, Aoi was basking happily in the adoration of the boys, thoroughly enjoying her status as the princess of the otaku circle.
◆ ◇ ◆
Meanwhile, a welcome party had been arranged for the new faculty members, and once the workday ended, Yurika and the staff relocated to an izakaya.
“Now that the festivities are well underway, I, Yamada, would like to speak on the three vital virtues of education! First, patience. Second, thick-skinned nonchalance. Third, sexual prowess! Ah, goodness gracious, look at me slipping up! Ghahaha!”
The vice principal’s vulgar old-man joke exploded without warning, leaving Yurika wishing she could go home before the night had even started.
Lured by Yurika’s peerless beauty, male teachers approached her one after another, only to be shot down in flames without exception. Not a single man could make the slightest dent in her defenses.
“Come now, Akashi-sensei! Tonight is a celebration in your honor. Let us talk long into the night about educational theory!”
Vice Principal Yamada pressed forward with heavy breaths, but Yurika gave him an icy, businesslike brush-off. Yamada had no choice but to retreat, thoroughly deflated.
(Geez! I just want to go home and flirt with Yuu-kun! What do you mean, talk through the night?! I’m not talking anywhere near through the night!)
With the flames of lust smoldering inside her, all Yurika wanted was to rush home and administer Yuu’s punishment.
Just then, a pleasantly tipsy Hanako wandered over to her side, tilting a beer bottle to pour a drink.
“Masteeeer~, are you drinkiiing~?”
“Suetsumu-sensei, please stop with the ‘Master.’ I am your junior colleague.”
Despite Yurika’s refusal, Hanako’s eyes only sparkled brighter.
“But Akashi-sensei is my deeply respected Master!”
“‘Master’ is embarrassing, so please call me something else.”
“Then... Queen?”
“‘Master’ will be fine, thank you.”
And so, “Master” was officially locked in.
“Come to think of it, that boy was Master’s little brother, wasn't he? Akashi Yuu-kun, right?”
“Excuse me?”
Hearing Yuu’s name slip from Hanako’s lips, Yurika’s brow twitched with an immediate, sharp reaction.
“Must be nice~. I want a cute little brother too~...”
“Excuse me, Suetsumu-sensei. Haven't you had a bit too much to drink?”
Yurika casually nudged the beer bottle away from Hanako.
“I wonder if there’s a cute stepbrother out there for me, just like Shouta-kun~...”
Hanako’s problematic remarks showed no signs of stopping. A single misstep, and she seemed poised to stomp straight onto a landmine.
“Washing each other’s backs in the bath every day... sleeping side by side every night~...”
Hanako fired off a barrage of scandalous comments utterly unbecoming of a teacher. The irony, of course, was that she was merely describing Yurika’s daily routine.
Once the welcome party wrapped up, Yurika was desperate to hurry home, but found herself saddled with taking care of the utterly plastered Hanako.
“Come on, Suetsumu-sensei. Pull yourself together.”
“Hwaaah~... Queeeen-samaaa~...”
“I am not the Queen! I’m Master!”
By this point, Yurika had begun referring to herself as Master.
“My Shouta-kuun~... Hic...”
“Aargh, honestly, what is with you?!”
Yurika furrowed her brow in irritation. While Hanako was behaving almost identically to how Yurika acted around Yuu, seeing someone else do it was infuriating.
Ultimately unable to abandon Hanako on the street, Yurika was left with no choice but to bring her back to the Akashi household.
A taxi pulled up in front of the Akashi residence. Alongside the driver, Yurika dragged Hanako up to the front entrance. Her senior colleague was truly a handful.
Yuu, who had returned home earlier and been waiting for Yurika, rushed to the front door upon hearing the commotion.
“Onee-chan, welcome home... Huh? Sensei?!”
Yuu froze in shock at the sight of Hanako passed out in the entryway.
“Ah, Yuu-kun. Help me carry Suetsumu-sensei inside.”
“Sure.”
Yuu carried Hanako into the living room and gently laid her down on the sofa.
Having braced himself for a severe punishment the moment his sister walked through the door, he couldn't help feeling a tiny twinge of disappointment.
However, this was Yurika.
“Yuu-kun!”
Without warning, Yurika threw her arms around him.
“W-Whoa, Onee-chan?!”
“Yuu-kun♡ I can't hold back anymore♡ I’ve been horny all day since earlier~!”
Her eyes practically swimming with pink hearts, Yurika pressed her body—coated in a day’s worth of sweat, dust, and sheer pheromones—flush against his.
A richly sensual fragrance drifted into his nostrils, and that alone made it impossible for Yuu to suppress the surging heat in his chest.
“Onee-chan, stop, we can't! Sensei is right there!”
Yuu tried to push her away, but having flipped her switch, Yurika’s eyes gleamed devilishly.
“Fufu, should we do it? Right in front of Sensei?”
Yurika whispered the demonic temptation into his ear.
Enveloped in Yurika’s sultry, sweat-scented pheromones, Yuu’s pulse raced out of control. He wanted nothing more than to wrap his arms around her and hold her tight.
Yet Yuu had endured this long for a reason. If he indulged in sex the second their parents were gone, his vow to hold out until he became a full-fledged adult would be nothing but a lie.
More importantly, his homeroom teacher was asleep right in front of them. In a situation like this, if Hanako woke up, Yurika’s standing as a teacher would be ruined.
“We can't, Onee-chan.”
Naturally, Yuu refused.
“Eeeeh~?”
Yurika puffed her cheeks and pouted.
Even before that adorable display, Yuu’s resolve did not waver.
“I will never betray you, Onee-chan, and you're the only one I ever look at.”
“Saying something that makes me so happy only makes me want to do it more~!”
Yurika pressed her chest even harder against him.
(Guh, I can’t succumb to the demonic sister’s temptations...!)
“Who are you calling a demon?! Geez!”
Reluctantly, Yurika pulled away.
She was well aware of the danger herself; it was merely an older sister’s longing to indulge in a little intimacy.
Yet had Yuu been inclined, they might genuinely have crossed the forbidden line right before Hanako’s eyes—engaging in a breathless, stifled tryst in the presence of his homeroom teacher.
“Honestly, what am I going to do with you? I’ll go prepare a futon for Sensei, so why don't you go take a bath, Onee-chan?”
Looking mildly exasperated, Yuu stood up.
“Hmph! Yuu-kun, you meanie! What am I supposed to do with all this pent-up frustration?!”
Fuming with irritation, Yurika began stripping off her clothes right there. With the younger brother practicing admirable restraint, it was the older sister throwing a tantrum and shedding her garments across the floor.
“Don't take your clothes off here~!”
Yuu’s protests fell on deaf ears as Yurika stripped down to her underwear.
As if deliberately putting on a show, she swayed her tantalizing figure, propping a long leg up on the sofa to peel off her sheer black stockings. With more skin exposed, Yurika’s pheromones spiked exponentially, filling the room with a thick, intoxicating musk.
Rolling the stockings into a neat ball, Yurika tossed them straight at Yuu.
Smack!
“Well then, I’m off to the bath.”
Shooting Yuu a lingering, suggestive glance as he stood there blushing, Yurika sauntered out of the room.
“Good grief... She gets embarrassed over a flashing pantyshot, but she has zero shame walking around in full lingerie?!”
Once Yurika left, Yuu finally let out a long breath.
In his hand, he held Yurika’s freshly discarded black stockings. He had caught them out of pure reflex when she threw them.
Still warm to the touch, they had been worn all day and were thoroughly steamed. The toe sections in particular were guaranteed to be fully steeped in a rich, concentrated sisterly scent.
“Ugh...”
Yuu froze, his eyes locked onto the stockings.
(O-Onee-chan’s intoxicating black tights... Worn all day, warm and muggy... I-If I... took a deep whiff of these, what would they smell like?)
Grip!
Yuu shoved the hand holding the stockings far away from his face.
(N-No! If I do something that degenerate, there’s no coming back! Aaargh, but I want to smell them! That concentrated scent of Onee-chan!)
Sensing a presence, Yuu jerked his head up.
Through the crack in the door, Yurika was peeking in with a sly, knowing grin. She had pretended to head to the bath just to secretly watch his reaction.
Whoosh—
Yuu’s face flushed crimson in an instant.
“Hey, you! What are you peeking for?!”
“Mfu-fu-fu~♡ Yuu-kun, want me to let you have those?”
Yurika murmured with a face that showed she knew exactly what he planned to use them for.
“Just hurry up and get in the bath! And throw these in the washing machine yourself!”
Thrusting the black stockings back at her, Yuu pushed her toward the bathroom.
“All right, all right, I was only joking~.”
“It’s not funny!”
Hearing the sound of the shower running from the bathroom, Yuu breathed a heavy sigh of relief.
What would have happened if he hadn't noticed Yurika watching him?
Yuu felt terrified of himself. At this rate, he was on the verge of craving anything that belonged to his sister.
(Onee-chan... The fact that she was peeking means she thought I was going to sniff her stockings, right? At that rate, far from being angry or disgusted, she’d probably find it thrilling and shove them right in my face to sniff more. If anything, she’s the bigger pervert here!)
The faint tactile sensation of his sister’s pantyhose still lingering on his skin threatened to drive Yuu insane.
(Aaaaargh! That kind of abnormal fetish is no good!)
Embarrassed, he covered his face with his hands, only for the lingering scent of his sister on his fingers to send his embarrassment into overdrive.
“A-At any rate, calm down. I have to prepare Sensei’s bedding.”
Yuu headed to the adjacent Japanese-style room to fetch a guest futon.
Yuu gently draped the futon over Hanako as she slept on the sofa. Looking at them now, it was hard to tell which one was supposed to be the teacher.
“The homeroom teacher crashing at a student’s house on the day of the entrance ceremony... what kind of situation is this?!”
As he pulled the futon up to her neck like a babysitter, Hanako, who was supposed to be dead asleep, fluttered her eyelids open.
“Auhn... Shouta-kuun~...”
Half-asleep, Hanako seemed to have mistaken Yuu for her fictional favorite character.
“Wait, huh? Who in the world is Shouta?”
Yuu responded with natural confusion.
Hanako was lost deep in a dream—
(Aah, Shouta-kun... You crossed the boundary between dimensions just to come see me. Haahn~! My Shouta-kuun!)
Anime: A Boy’s Perversion: Purgatory Arc.
“Sh-Sh-Shouta-kun! Lick, lick, lick, lick!”
“Whaaaat the—?! Let go of meee!”
Whether drunk or merely sleep-talking, Yuu found himself tackled and embraced by an out-of-control Hanako. Her tongue was frantically darting out, crossing every conceivable line.
“Lick, lick, lick—”
“Th-This is a total nightmare!”
As Yuu desperately tried to peel Hanako off him, a terrifying presence descended behind his back.
“Yuu-kun, just what do you think you are doing......?”
Rumble, rumble, rumble, rumble, rumble!!
Fresh out of the bath, Yurika stood framed by an aura so heavy it seemed to manifest manga sound effects behind her. It was the quintessential older-sister stance.
“Ah... I’m dead...”
Yuu reached instant enlightenment. He was fully prepared to accept both the lecture and the punishment.
“I’m thowwy...”
Wearing an expression of absolute remorse, Hanako hung her head.
Before Yurika, who towered over them with overwhelming, menacing presence, both Yuu and Hanako sat politely in formal seiza on the floor.
“Suetsumu-sensei... laying a hand on my Yuu...”
Yurika was a single hair’s breadth away from genuine fury.
“I-I-It’s not what it looks like! I was just sleep-talking! It wasn't intentional! Please believe me, Queen!”
Hanako bowed frantically, pressing her forehead down again and again.
“A teacher laying hands on a student is a massive scandal. Also, it’s not ‘Queen,’ it’s ‘Master.’”
Completely ignoring her own conduct, Yurika spouted pure righteousness.
“So you did accept ‘Master,’” Yuu interjected.
“Yuu-kun, be quiet!”
“Yes, ma’am...” Yuu clamped his mouth shut obediently.
“M-Master, please, anything but reporting me! If word of this gets out, it’ll become an official incident! The school will send a mass emergency email: ‘Incident Alert: Female teacher licks student while screaming the name of a fictional youth’!”
Hanako’s desperate defense sounded uncannily similar to someone else Yuu knew, and he had to fight back a burst of laughter.
“Pfft!”
“Yuu-kun, don't you dare laugh!”
“Yes, ma’am...”
After receiving a blistering, thorough reprimand from Yurika, the two were finally released.
Having firmly sworn her devotion strictly to 2D boys, Hanako was beside herself with remorse for laying hands on a real-life Yuu-kun.
“Sensei, everyone makes mistakes. Just be careful from now on, so please don't let it bother you.”
Yuu spoke up in an attempt to cheer her up.
“Akashi-kun, you are so kind... I feel like I might fall in love with you.”
“Suetsumu-sensei!”
“Yeth!”
Unclear on whether she had learned her lesson or not, Hanako blurted out another borderline line and was immediately snapped at by Yurika. The gaze Hanako directed at Yuu still held an undeniably suspicious gleam.
“And Yuu-kun! Stop unconsciously seducing people!”
“Yes, ma’am... Though I wasn't seducing anyone...”
Yuu’s casual kindness seemed to pierce Hanako right in the heart, keeping Yurika’s gaze icy and stern.
With the hour growing late, they left Hanako asleep in the living room while Yuu and Yurika headed upstairs.
Ascending the steps, Yurika reaffirmed her belief that any woman approaching Yuu was a high-level threat.
(Honestly, Suetsumu-sensei really is someone to watch out for... Then again, the real culprit is Yuu-kun for being so utterly wonderful. Do I really need to squeeze out all of Yuu-kun’s seed myself so he doesn't have any left to wander off to other women?)
Yurika’s train of thought was firmly in dangerous territory. She was hardly one to talk.
“Well then, Onee-chan. Good night.”
Reaching the second floor, Yuu opened the door to his room. However, Yurika remained glued right to his back.
“Wait, why are you coming in with me?”
“Because, because, I want to sleep next to Yuu-kun!”
Her words were the exact opposite of what she had preached moments ago. Wherever had that high-minded lecture about teachers laying hands on students disappeared to?
“But Sensei is right downstairs...”
Yuu nervously cast his eyes toward the floor below.
Yurika, on the other hand, seemed only more thrilled by the prospect.
“Thinking that Sensei might hear us makes my heart pound so fast♡”
“Ah, she’s completely beyond reasoning with...”
Giving up, Yuu lay down on the bed alongside his sister.
The moment he climbed under the covers, Yurika squeezed him in a fierce embrace.
“Yuu-kun♡ Yuu-kun♡ Yuu-kun♡ I love you♡ I love you so, so much♡ I won't give you to anyone... not to anyone...”
Holding Yuu tightly against her, she murmured the words over and over, as if staking her claim that she would never let another soul touch her precious Yuu.
“Onee-chan... I can't breathe...”
Wrapped in both her arms, with her legs tangled tightly around his, Yuu was completely pinned down.
Fired up by the jealousy of seeing another woman cling to him, Yurika’s possessive instincts had thoroughly detonated.
“Yuu-kuun♡ I love you so much♡”
“I... I love you too, Onee-chan.”
He wondered if she would keep him locked in her embrace until morning, but after a short while, Yurika released him. Reassured by Yuu’s words, she had evidently found peace of mind.
Enveloped in the comforting scent of his sister, Yuu drifted off into a deep slumber.
“Yuu-kun, are you asleep...?”
Confirming that Yuu had slipped into soft, rhythmic breathing, Yurika—who had only been pretending to sleep—slowly propped herself up.
“Yuu-kun, I’m borrowing your hand for a bit.”
With that whisper, Yurika guided Yuu’s limp hand down toward her thighs.
Gazing at him with eyes overflowing with affection, she slid his fingers beneath her underwear.
“Yuu-kun♡ Ah♡ Yuu-kun’s fingers...♡”
Pressing Yuu’s fingers against her sensitive spot, Yurika squirmed beneath the futon.
Letting out hot, ragged breaths, Yurika sank Yuu’s fingers deep into herself. A piercing euphoria washed over her—a deliciously illicit act. Amid the scorching flames of lust consuming her body, she whispered Yuu’s name again and again.
“N-Aahn♡ Yuu-kun♡ Yuu-kun♡ Yuu-kun, I’m sorry♡ I’m sorry for being such a perverted big sister♡ Ah!♡”
Using Yuu’s fingers, Yurika indulged in countless unspeakable, forbidden acts.
◆ ◇ ◆
Following that tempestuous night, Yuu came downstairs the next morning to find Hanako nowhere in sight. Yurika was simply preparing breakfast as though nothing unusual had transpired.
“Good morning, Onee-chan.”
“G-G-Good morning... Yuu-kun.”
When Yuu greeted her, Yurika’s shoulders jerked with a start, her eyes darting frantically about. Her behavior was conspicuously suspicious.
“Hm? Is something wrong?”
“N-N-Nothing at all...!”
Her behavior was unmistakably bizarre. Her face was flushed bright red, and she adamantly refused to meet Yuu’s gaze.
“Ah, come to think of it, where’s Sensei?”
Yuu scanned the living room where Hanako had been sleeping.
“Suetsumu-sensei had to change and get ready, so she went home early this morning.”
“I see.”
As Yuu stepped up beside her, Yurika’s blush deepened and she began fidgeting nervously.
Tilting his head at her strange demeanor, Yuu’s eyes drifted toward the freshly cooked food.
“Ooh, this rolled omelet looks delicious.”
Reaching out for a quick taste, Yuu pinched a piece of omelet between his fingers.
In that instant, sheer panic flashed across Yurika’s face.
“Y-Yuu-kun, did you wash your hands?!”
“Hm? Not yet. It’s just one bite.”
Munch!
Yuu popped it straight into his mouth.
“Mm, delicious.”
Lick!
Having finished the bite, he casually licked his finger clean.
“Nnnghhhhh~~~~~♡”
Yurika clutched her burning cheeks, her blush spreading all the way to the tips of her ears.
“Onee-chan, what’s gotten into you?”
“N-Nothing, it’s nothing at all...!”
His sister was acting undeniably weird, but since she was weird almost every day, Yuu decided not to dwell on it.
“Well, I’m going to go wash my face.”
With that, Yuu stepped out of the kitchen.
Left all alone, Yurika was an absolute mess of intense guilt, inexplicable euphoria, and embarrassment pushed far past its limits.
(Yuu-kun... I’m sorry. No matter how pent-up I was, using Yuu-kun’s fingers was... It was a moment of weakness, or my restraint snapping, or... Wait, he just licked that exact finger! The finger that was inside my... Aaargh! That’s basically like having him lick it indirectlyyy~!)
Whatever the specifics, today, as always, Yurika remained Yurika.
◆ ◇ ◆
On the morning of their second day of school, Yuu entered the classroom, expecting Takami to approach him as usual—except she didn't.
“Morning, Chuujou-san.”
“Hmph.”
Though Yuu offered a greeting, Takami ignored him entirely and walked right past. It was pure, one hundred percent tsun. She was clearly still fuming over yesterday.
As Yuu stood there bewildered, Maria sauntered over in her place.
“’Sup, Akashi.”
“Ah, Yuugiri-san. M-Morning.”
Yuu’s guard immediately went up.
Her uniform had an open collar paired with a noticeably short skirt. Bright blonde hair matched with sharp, piercing eyes. She was precisely the type of girl Yuu struggled with, yet for some reason, he always managed to attract rowdy or headstrong girls.
Other boys often remarked: “I’m so jealous you get to hang out with such a cute girl.”
“Say, so about—”
Just as Maria began to speak, Hanako entered the classroom, accompanied by Yurika.
“E-Everyone, morning homeroom is starting. Please take your seats.”
Maria flashed a fearless, teasing grin.
“Catch ya later.”
“Y-Yeah.”
Giving Yuu a meaningfully suggestive look, Maria returned to her seat.
(Could it be that a delinquent gyaru has set her sights on me? She’s not going to call me behind the gym later, is she...?)
Yuu remained as oblivious as ever, snapping classmate heroine flags in half with effortless precision.
Once homeroom concluded, Hanako quietly approached Yuu.
“A-Akashi-kun... I’m so sorry for causing you trouble yesterday.”
“Ah, no, it’s totally fine. One definitely has to be careful with alcohol, right?”
Yuu gave a safe, diplomatic answer. If the other students found out she had made such a drunken spectacle of herself, the teacher’s reputation would be entirely ruined.
However, Hanako went on to volunteer far more than necessary.
“Um, the thing is... it was my first time. To have it be so hot and intense... Ah, it’s so embarrassing...”
“Huh?”
At Hanako’s bizarre phrasing, Yuu whipped his head around to make sure nobody was listening.
“H-Hold on, Sensei! What are you talking about?! W-We didn't do anything, right?!”
Sounding as though she were describing her first intimate encounter, Yuu desperately tried to clear up any misunderstanding.
“Ah, well, you see... that was my first time hugging a man. I know it’s wrong, but I keep remembering it over and over...”
“No, no, no, please just forget it! Besides, what are you bringing that up in the classroom for?!”
Faced with Yuu, who bore such a strong resemblance to her favorite fictional character, she had already experienced it as her first time in her heart.
“Y-Y-Yes, you're right! Doing that in the classroom is out of the question!”
Rumble, rumble, rumble, rumble, rumble!
“Suetsumu-sensei......”
“Yeth!”
Emerging from behind with a terrifyingly heavy aura, Yurika caught Hanako red-handed.
“Come now, the next period is starting. Let us be on our way.”
“M-Master, as expected, your dignity is incredible! It truly gives me chills of pure admiration!”
Dragged off by Yurika, Hanako was forcibly removed from the room.
It was hard to tell which of them was the senior colleague, but strangely enough, they seemed to make quite a good comedic duo.
In the afternoon, the period everyone had been eagerly anticipating finally arrived: mathematics.
The reason was simple: the teacher in charge was Yurika.
“We will now begin mathematics. Many tend to believe that math is useless once you graduate. However, mathematics is not merely about memorizing formulas; it is a vital discipline that cultivates logical thinking—”
Standing tall and dignified at the lectern, she drew the admiring gazes of every student in the room.
“Akashi-sensei is so cool.”
“She’s gorgeous, but she has the dignity of a queen.”
“She’s wonderful. Beautiful, cool, and brilliant—a flawless beauty.”
“Truly a cool and logical queen. I bet she never loses her composure at home either.”
Not only the boys, but the girls were equally entranced by Yurika. Watching this unfold, Yuu felt a complex swirl of emotions—partly proud, partly amused.
(Onee-chan is actually teaching! It feels surreal, but I’m really happy!)
However, knowing that he was the only one privy to her true nature made his face relax into an involuntary smirk.
(Everyone calls her cool and a flawless beauty, but she isn't cool at all. At home, she’s pretty sloppy, leaves her clothes scattered everywhere, and looks for any excuse to punish me. She’s not cool and logical; she’s lewd and magical.)
Conjuring the image of the Yurika only he knew, Yuu indulged in a slight sense of illicit satisfaction.
“You there, Akashi-kun! Why are you daydreaming?!”
Naturally, Yurika called him out. In school, Yurika-sensei was strictly no-nonsense.
And so, Yuu and Yurika’s high school life continued.
When the chime rang to signal the end of the day, Maria approached Yuu once more.
“Akashi!”
“Huh?”
As Yuu offered a mildly surprised reaction, Maria’s expression shifted instantly into that of an aggressive predator.
“Heheheh, Akashi. You totally give off major virgin vibes. Have you seriously ever kissed anyone before?”
“D-D-Don't throw around words like virgin! And please, just forget about that already...”
As Maria leaned in close, deliberately putting her exposed cleavage on display, Yuu instinctively blushed and averted his gaze.
Seeing that reaction, Maria looked all the more delighted.
“Nheheheh~”
It seemed Yuu had thoroughly captured this gyaru’s interest.
(Damn it, she’s completely playing with me. Aren't gyarus in anime and manga supposed to be sweet, understanding of otaku hobbies, and secretly pure-hearted beneath the flashy exterior? Real-life gyarus are way too harsh!)
While Yuu struggled with real-life gyarus, he adored them in fiction. However, Yuu’s ideal template was the anime The Gyaru Big Sister Goes on the Offensive. He liked gyaru characters specifically when they doubled as sweet older sisters.
“Hup.”
Maria casually hopped up and sat on the edge of Yuu’s desk.
Right in front of his eyes was a rear clad in a pleated skirt. From beneath the short hem, healthy, bare legs were on full display.
“H-Hey, why are you sitting on my desk?!”
“Who cares? It’s not like it wears out.”
“I said you're too close!”
“What are you sneaking peeks for, huh? Peek-a-boo~”
Maria playfully fluttered the hem of her skirt.
She seemed to be having the time of her life watching Yuu get flustered at every little thing. Perhaps she wasn't a gyaru who liked otakus, but rather one who had a penchant for flustering virgins.
(This is bad! Is this some kind of trap?! I have to stop this before it triggers Onee-chan’s wrath!)
Slam!
“Excuse me, can’t you see Yuu hates that?!”
Takami abruptly shoved her way between them. Before triggering his sister’s wrath, it seemed he had stepped squarely on Takami’s.
“Knock it off. You're doing that on purpose, aren't you?!”
“Oh my, oh my~ Chuujou, could it be that you like Akashi or something?”
When Maria threw out the provocation with an amused smirk, Takami easily took the bait and fired back.
“H-Haaah?! N-No way! It’s nothing like that!”
“You forced your way into the seat next to Akashi at karaoke yesterday too, didn't you?”
“Th-That was because you were teasing Yuu!”
“Getting this defensive is totally suspicious.”
“I am not being defensive!”
To any objective observer, she was being entirely defensive.
“Haha, it’s written all over your face. You two have already kissed, haven't you?”
The moment Maria let the kiss topic slip, Takami blinked in blank confusion, while Yuu clutched his head in despair.
“Huh? Why on earth would we have kissed?!”
Met with Takami’s deadpan, genuine reaction, Maria was the one who faltered.
“Wait, seriously?”
“Y-Yeah. We haven't... kissed yet.”
Twiddling her index fingers together, Takami denied it with a bashful blush. Her emphasis on “yet” made it sound as though a kiss were an inevitability down the line.
Gauging their relationship from that reaction, Maria proceeded to make things worse.
“Aah... I see. You haven't done it yet. Akashi said he’d kissed someone, so I just assumed...”
“Wait, Yuu... you...?”
Fixed under Takami’s piercing stare, Yuu’s eyes darted frantically.
“N-No, that’s not it! It’s, uh, complicated...”
“Well, cut him some slack. Akashi totally looks like a virgin, right? He was probably just daydreaming about kissing one of the popular girls in class.”
Maria generously supplied an explanation on Yuu’s behalf—except it was completely wrong, making her helpfulness an absolute curse.
“H-Hold on, Yuu... do you want to kiss me?”
“That’s not it! It’s a misunderstanding!”
As Yuu scrambled to mount a defense, a terrifying, suffocating pressure loomed up behind him.
Rumble, rumble, rumble, rumble, rumble!
“My, my... I wonder if I might hear that story in full detail?”
At the sound of that beautifully chilling voice, all three turned around to find Yurika standing tall with a terrifyingly stern countenance.
“Oops, bad timing! Well, Sensei, see ya tomorrow~!”
The instigator who had stirred up the entire mess, Maria, bolted out of the room at full speed.
As for the other party involved, Takami turned to face Yurika with a remarkably serious expression.
“O-Onee-san, it’s fine! We haven't done it yet!”
Overwhelmed by Yurika’s sheer presence, Takami frantically insisted they hadn't done it yet—once again implying it was merely a matter of time.
“I see. So you haven't done it yet.”
“Yes, ma’am! We haven't done it yet!”
Gazing down at Takami earnestly stressing the “yet,” and then at the trembling, terrified Yuu, Yurika spoke with solemn weight:
“You two... while youth is a time when romance and dating are important, improper relations between the sexes are strictly forbidden.”
True to form, Yurika conveniently disregarded her own behavior to forbid improper relationships.
“Y-Yes, ma’am. I understand, Onee-san.”
“Yes. You are a sensible student, Chuujou-san, so I trust you. Also, at school, it’s Akashi-sensei.”
“Yes, Akashi-sensei!”
Takami obediently corrected herself. Staring up at Yurika’s commanding, queenly aura, her eyes sparkled with sheer admiration.
“Ah, and Yuu. We need to have a talk later. Go straight home and wait for me.”
Having dropped that bombshell, Yurika turned on her heel and headed back toward the staff room.
Watching Yurika’s departing back, Takami tapped Yuu lightly on the shoulder.
“Your sister really is scary, Yuu. Looks like you're in for another lecture—complete with pro-wrestling holds.”
“Damn it, this is no laughing matter... How are you going to take responsibility for this...?”
Yuu’s shoulders slumped in utter defeat.
His worries went far beyond the lecture and the punishment. The thought that Yurika might have completely misunderstood his relationship with Takami filled him with sheer, unending dread.
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