Prologue

"......Graaaaah!"

I stretched my arms toward the ceiling, loosening my body along with a loud shout.

Outside, the world had grown dark. Having finished a lonely dinner by myself, all that was left was to go to sleep... and yet, that stretch had completely blown away my drowsiness.

"......"

However, once things became quiet like this, I couldn't help but remember.

"That was... way too erotic."

I was thinking about a few days ago, when Arisa and Aina bought new underwear.

Even though it was a shop managed by Sakuna-san, the tension of being in a place like that was immeasurable. But the sight of those two in their lingerie had been far too stimulating.

"......No, well, everything about them is erotic, though."

In conclusion, no matter what words I string together, my two girlfriends are beautiful and lewd!

Because of that, they draw a lot of eyes, both at school and out in public.

They’re plenty charming as it is now, but from here on, that charm is only going to increase. They’re bound to grow into women who attract even more attention than they do today.

"It’s a lot to handle... but as their boyfriend, I have to keep protecting them forever!"

I wonder how many times I’ve said those words since I started spending my days with the two of them.

Yet, the more I put it into words, the stronger my feelings for them become—almost like a kotodama taking root.

(T/N: Kotodama (言霊) is a Japanese belief that words possess a mystical power, combining "koto" (word/language) and "tama" (soul/spirit), meaning the "spirit of language," where speaking certain words can directly affect reality, bringing good fortune or misfortune.)

"......Yo, you feel the same way, don't you?"

I directed that question toward Jack, who was staring at me boldly from atop my desk.

He had that same smirking pumpkin face as always, but he remained a key item for me—the one who brought me together with the girls. He was a cursed item that would stay here forever... wait, calling him "cursed" is a bit harsh, isn't it?

"..............."

I lay down on my bed, spending some time just spacing out and doing nothing.

"......Man, the sports festival just ended, but the cultural festival is already next."

In terms of major upcoming events, the sports festival had just concluded.

It was my second sports festival since entering high school, but it was the first one since Arisa and Aina... since I gained these precious girlfriends.

It was truly exciting from beginning to end, and it became a peak memory that will live on inside me forever.

"The sports festival was amazing, but I want to make the cultural festival a peak memory too."

Well, it’s not like this is my last year, but I’ve really come to want to cherish every single event from here on out... The fact that I’ve started feeling this way is undoubtedly thanks to them.

"......Wait, the cultural festival aside, I feel like I'm forgetting something."

Actually, something had been snagged in the back of my mind for a while now.

Between the memories of the sports festival, the expectations for the cultural festival... and all the various lewd things involving my girlfriends... what was it?

After staring at the ceiling and searching my brain desperately for several minutes, I finally remembered.

"Ah, it's my birthday!"

Don't go forgetting an important day like your own birthday, me...

But looking at it from another perspective, you could say that recent events have been so fun that I actually managed to forget it... Yeah, let's go with that!

"I wonder if... Arisa and Aina remember."

While feeling a bit of expectation, I couldn't help but wonder.

Last year, Sota and Kaito celebrated with me, and my grandfather and grandmother sent their wishes every year like clockwork, so I wasn't lonely. Even so, I couldn't stop thinking about spending that time with my precious girlfriends.

"......Hehe."

I'm looking forward to it... I'm really looking forward to it.

I caught a glimpse of myself in the mirror; I had a look of pure delight on my face, brimming with anticipation.

"Well then... time to get some sleep."

I hope the future turns out like that.

After imagining it so much, I gradually started to feel sleepy... Come to think of it, Arisa and Aina said they’d be coming over tomorrow morning, so I’d better get to sleep early so I don't oversleep.

"Goodnight then, Jack."

Even though I knew there would be no reply, it had become part of my routine.

The moment I closed my eyes, a heavy drowsiness enveloped my entire body. Just as I thought I'd be able to fall asleep instantly, my consciousness flickered out.

▼▽

The next day, I woke up because I heard a sound.

"Is that... Arisa and Aina?"

I voiced the question, but there was no one else it could be besides them, since they had spare keys.

If it weren't them, it would be an uninvited guest... someone I wouldn't even want to imagine. But it was probably Arisa and the other.

As I stayed still on the bed, listening for their presence, the sound of footsteps drew closer.

Just as I thought the footsteps had stopped in front of the door, there was a gentle knock.

"Hayato-kun, are you awake?"

It was Arisa’s voice. As expected, I felt relieved knowing it was them.

"..............."

Feeling like playing a little prank, I decided not to answer Arisa’s call and pretended to be asleep instead.

Is this a bit mean...?

But this is also something I can only do because I have a girlfriend who comes to wake me up in the morning.

"Does it look like he's not awake yet?"

"It seems so... Shall we just go in?"

Oops, it sounds like Aina is right there too.

Before long, the door opened and the presence of the two of them drew even closer... Pretending to be asleep like this makes my heart pound—not because I’m worried about being caught, but because I’m wondering what they might do to me.

"Fufu, he's still sleeping."

"......Looks like it."

"What's wrong?"

"No, it's nothing. More than that, seeing your beloved boyfriend's sleeping face is just the best, isn't it? ♪"

"That’s true. I love every expression Hayato-kun makes, but being the only ones who get to see him in such a defenseless state... it makes me so happy. ♪"

They’re saying some incredibly sweet things...!

I was moved as I kept my eyes closed, but then I felt one of them sit on the edge of the bed.

Is this... Aina?

"......Nee-san."

"What is it?"

"Seeing Hayato-kun all defenseless like this... as his girlfriend, it would be wrong not to play a prank on him, wouldn't it?"

"That... is true."

"Right? Look, since it's morning, he's already gotten a bit big. ♪"

Ah... how embarrassing...

I was so focused on deceiving them that I had completely forgotten about that particular morning physiological phenomenon.

"If he's grown big, we have to help him feel refreshed."

"I won't say 'this early in the morning...' or anything like that. Yes, what Aina is saying is correct."

Another weight was added to the bed... and a hand was softly placed on my thigh.

That hand gently caressed my thigh, but given the situation, there was nothing but a sense of lewdness in the way she touched me.

"..............."

I mean, being touched like this in this situation... and knowing exactly what the two of them were about to do, my excitement only grew stronger.

"Ah, look, look, Nee-san!"

"Wonderful... ♡"

It seemed they were both delighted by my change.

The hand that had been touching my thigh gradually moved toward my important part, fingers crawling as if to caress the very tip.

It was so ticklish that I reflexively trembled, but even that seemed to be a reaction they enjoyed... Wait, I've completely lost my chance to 'wake up' now...

"Let's just take these off."

And just like that, I was stripped buck naked in an instant and touched directly.

If you asked if this is how lovers usually spend their mornings, it’s far too degenerate. But it’s only because we’ve become so close as lovers... I mean, I'm the same, but those two really lost all their restraint once we crossed the line.

"Want Nee-san to do it for you?"

"Oh, would that be alright?"

"It's fine. In exchange, I'm gonna kiss Hayato-kun."

I heard the sound of rustling clothes, followed by a blissful elasticity against my lower half and that sweet scent I love so much wafting from right nearby... What is this space? Isn't this just way too much happiness?

"Wow, Nee-san, you're being bold."

"Hayato-kun loves breasts, after all. He'll be even happier if I sandwich him like this."

"We're really lucky our breasts are big, aren't we?"

Even without opening my eyes, I could understand everything through their conversation.

...But thinking about it calmly, there’s no way someone wouldn't wake up from being treated like this. They’d definitely open their eyes... well, except for me, who’s currently pretending to sleep!

"Hayato-kun, I love you."

Chu. The sound of a wet kiss echoed. It was a kiss from Aina.

My cheeks almost loosened at her kiss, but I endured. However, the pleasurable stimulation being transmitted from my lower half was so intense that enduring it like this felt like a mix of heaven and hell.

Yet, in a situation where I could only conclude that I was happy no matter how I thought about it, the following conversation took place.

"Nee-san."

"What?"

"It's almost Hayato-kun's birthday. Aren't you looking forward to it?"

Birthday...!?

To think they would talk about the very thing I was thinking about all last night... I see, they really did remember!

"Yes. When it was our birthdays, Hayato-kun supported us... I’m so happy that we can finally return the favor."

"Mom was really fired up about it too."

Oh... even Sakuna-san is going to celebrate?

Well, I knew that not just Arisa and Aina but Sakuna-san would celebrate too, but... honestly, it makes me so happy to have the things I wished for actually happen.

"Oh ho? Did his cheek just twitch a little? Nyah?"

"Oh, is Hayato-kun awake?"

"Nope, he's not. I just felt like that for a second."

"Is that so?"

"Yep. ♪"

Phew... that was close.

Aina's voice sounded like she was certain, though... Did she really not notice?

"Hayato-kun is a really kind person, isn't he?"

"That’s already perfectly obvious."

"I just felt like saying it again! ♪ He’s kind to me and Nee-san, but he’s also really kind to Mom, isn't he? Even though he's a student just like us and should be the one being pampered, he's always asking if there's anything he can do to help."

"Fufu, Mom was troubled by that too. She wants to pamper Hayato-kun, but he shows her such a reliable side, just like a grown man."

Isn't that... a good thing?

"Hayato-kun probably thinks that just being pampered all the time is no good. Well, I like that about him too."

"We also think it would be fine for him to just depend on us. He could just drown in our love... that would be enough."

Ugh... the conversation has turned into something incredibly embarrassing!?

However, that shameful time was nearing its end—I had reached my limit.

"Hayato-kun, you're awake, aren't you?"

"!!?"

"Eh? Kyah!?"

At the moment I reached my limit, I was beyond startled by Aina’s words.

But it seemed Arisa was surprised in a different way, and I ended up releasing my desire toward her while she was caught off guard.

"Ahaha! I knew you were awake."

"......Aina."

I see... so Aina really had noticed after all.

Resigning myself, I opened my eyes to see Aina looking down at me gently, and Arisa happily scooping up what had landed on her face with her finger to lick it off. Thinking what a luxurious and degenerate way this was to wake up, I sat up.

"Good morning, Arisa. You too, Aina."

"Yes, good morning, Hayato-kun."

"Mornin'~ Hayato-kun! ♪"

As soon as she greeted me, Aina hugged me, so I caught her firmly.

I’ve been hugged by them so many times now that my core has been quite well-trained; catching them is second nature.

"Aina, that's not fair. Let me join in too!"

"Wait, Nee-san!?"

"Whoa!?"

No, having both of them at once is...!!?

I was showered with a rain of kisses as they pinned me down. Since I also wanted to flirt with them and we had time to spare, I spent a thoroughly sweet time with them.

"By the way, Hayato-kun, please look forward to your birthday, okay?"

"We're gonna celebrate a ton!"

While we were flirting, those words whispered into my ear put me at the height of happiness.

Of course, the actual celebration hadn't happened yet, but just hearing them say that made me feel so blessed.

"Actually... I remembered it was almost my birthday right before I went to sleep. I was wondering if you two would remember."

"Oh, as if we would ever forget."

"I haven't forgotten for a single moment, you know?"

Ah... I'm so happy I feel like I'm going to cry.

Even though there have been countless moving moments while spending time with them, if I get this emotional every single time, my tears are going to run dry.

"Hayato-kun, here's a handkerchief."

"Eh?"

"You're crying, you know?"

"..............."

I thought I was holding it back, but apparently, I was crying quite a bit... Phew.

However, because I was able to talk about my birthday with the two of them, the anxiety I didn't even need to worry about was completely wiped away.

Perhaps because of that, after I left the house and arrived at school, I was apparently smiling so much that it caught my best friends' attention.

"Yo, Hayato."

"Aren't you in a pretty good mood this morning?"

Even my friends were saying things like that.

And so, in that good mood, during the morning assembly, the teacher talked about the upcoming cultural festival.

"The sports festival just ended, but the cultural festival is right around the corner. We'll discuss what each class will do at a later date, but it's going to be busy for everyone again, so let's do our best."

Just as the teacher said, busy days were coming for us students once more.

However, looking at my classmates' expressions, every single one of them looked like they were looking forward to the cultural festival.

"Everyone seems to be looking forward to it."

"It's a special cultural festival. Everyone thinks it's a waste if they don't enjoy it."

"True."

Yeah, a once-a-year festival... The sports festival was the same, but I have to enjoy the cultural festival to the fullest too.

"You know."

"Yeah."

"The sports festival was like this too, but the cultural festival... everything is just fun."

"Is that because Arisa and Aina were added to your daily life, Hayato-kun?"

I nodded "of course" to Arisa, who said that while puffing out her chest proudly.

For the current me, even without events like the sports festival or the cultural festival, the days I spend with Arisa and the others are so fun that I've never thought of them as boring, even for a moment.

Being able to feel this way is truly a blessing... Thinking that naturally made my cheeks loosen, which was a bit of a problem.

"Fufu."

And every time that happened, it was also part of the routine for Arisa to laugh at me like this.

Well then... while my days at home and at school are fulfilling like this, I’ve actually been harboring a little bit of a worry lately.

It’s almost too luxurious a thing to call a "worry," and even I feel like having such a worry is sinful... If it were anyone other than me, they’d surely punch me for bragging.

"..............."

I stole another glance at Arisa.

She was already looking forward and didn't seem to notice my gaze... but the source of that worry was none other than Arisa and Aina.

No, I know... this really is a luxurious worry.

"What's wrong? Is something worrying you?"

"No, it's nothing."

I thought she wasn't looking, but she noticed anyway.

Whenever I'm harboring a worry, Arisa and the others notice immediately.

Because I shook my head at Arisa, who was looking at me with concern, she looked at me suspiciously but didn't pry any further.

However, I was reminded during lunch break that Arisa wouldn't just leave something she was curious about alone.

"By the way, Hayato-kun."

"Yeah?"

"During the morning assembly, you were worried about something, weren't you?"

"Eh? Really?"

The corner of the rooftop—a blind spot where no one could see us.

While I was spending a sweet time with my precious lovers, Arisa and Aina, she suddenly asked me about my worry.

Since it had already left my mind, my body gave a start. Arisa had a triumphant look on her face, and Aina, who didn't know the circumstances, leaned her face in close, looking curious.

"No, it's not really a worry or—"

"Now, Hayato-kun, you don't think I wouldn't notice, do you? I know everything about you."

"Hey, hey! What's this about, Hayato-kun!?"

It seems... it's going to be impossible to evade this.

Thinking it would be unpleasant for both of us if I didn't talk, I decided to confess honestly.

"Well... it's a worry that's far too luxurious to even call a worry."

The luxurious worry I was harboring was—

"Look, lately, we... since we crossed the line, we've lost all our self-restraint. We immediately start wanting each other, right? I was just wondering if that's... a bit too degenerate."

Yes... that was the worry I was feeling.

It’s not like I think it’s a bad thing, but once we crossed that line, the word "restraint" disappeared from between us. The moment we both feel like we want it, the atmosphere has usually already turned that way.

Coming this far, I feel nostalgic for the innocence of the first time we shared our bodies, but when I’m faced with my lewd girlfriends... when they demand it lewdly, I immediately get into the mood.

"I see... certainly, come to think of it, maybe we are having too much sex."

"Ahaha... it feels so good, and more than anything, I just can't help but want to love Hayato-kun! ♪"

Ugh... she’s saying something incredibly heart-stirring!

"It's not that I hate it either, so I don't want to say let's stop doing it... I admit it—I love having sex with Arisa and Aina too, and I always feel like I want to do it."

"Yes."

"Mm-hmm."

Since both of them felt the same way, they nodded at my words.

That's right... even though I said all that, I love having sex with the two of them, and it fills my heart to the brim... Just saying that makes it sound like it's not a worry at all. Is there really no need to care about it...?

When I thought about it again in front of Arisa and Aina, I started to feel like it was a trivial worry, but I’d already talked about it, and it seemed they had something to say too.

"A student's primary duty is to study... thinking about it that way, I can certainly understand how you feel."

"That's true... and our relationship is also special, in its own way."

I nodded "mm-hmm."

I felt a bit relieved that they empathized with me... My intuition wasn't wrong after all.

But well, there’s no need to worry about loving your partners!

"......No, sorry. I brought it up, but it's not like I was actually troubled by it... so it wasn't really a worry or anything."

I told them I was sorry for saying something strange and tried to switch to another topic, but Arisa gave me a passionate kiss to silence me.

It wasn't just a light touch, but a deep, wet kiss with our tongues entwined... An erotic kiss that made it seem like she hadn't even heard what I just said.

"Hayato-kun, I love you. ♡"

She pulled her face away for a moment to whisper her love, then gave me another deep kiss.

Kissing like this got me in the mood, and my hand naturally went toward Arisa's large, soft breasts, my fingers sinking into the soft flesh.

"Fufu, you can stay like that, but will you listen?"

Aina, who was snuggling up close beside me, whispered into my ear.

Indulging in her words, I continued to kiss Arisa while also paying attention to what Aina was saying.

"Just like you thought it was degenerate, Hayato-kun, it's true that we often lose our restraint. But we're properly making sure that nothing 'accidental' happens, right?"

That's true... that's one thing we always have to be careful about.

"It's not like our grades are dropping because of too much sex, or anything inconvenient is happening. In fact, I think both you and us are putting more effort into our studies than ever before."

Ah... that’s also just as Aina said.

"Too much of anything isn't good, okay? But at this stage, there's absolutely nothing to worry about! Well, it's just that both Nee-san and I love having sex with Hayato-kun! ♪"

I... I also love having sex with the two of them, and of course, I love the time we spend together.

As if agreeing with Aina's words, the kiss Arisa was giving me became even more intense.

When we kiss this intensely, there’s no way we can hold back... While keeping an eye on the time so we wouldn't be late for class, we left the rooftop in a refreshed state.

"Well then, Hayato-kun, see you after school! ♪"

I parted ways with Aina and returned to the classroom with Arisa.

The scent of the two of them clung to my body in a pleasantly persistent way... Even though I was already in the classroom, my body grew hot and I started getting excited again.

"......Good grief, they really are too erotic."

"Pffft!"

Even though I thought I was speaking in a low voice, Arisa had heard me loud and clear.

She gave an innocent smile that showed no trace of the previous suggestive atmosphere... Just like with Aina, when I’m shown an expression like that, it really makes me feel like my worry was a trivial thing.

"We are who we are. It's fine as long as we're satisfied... right?"

"......True. Thanks, Arisa."

"You're welcome."

That's right... as long as we're satisfied, that's all that matters.

Of course, I’ll continue to be careful about the things I need to be careful about... In conclusion, let's just say that because they're too erotic, it’s bad for my health to try and hold back!

"Ah, but... I’m feeling a bit unsatisfied. So Hayato-kun—once we get home, please love me and Aina a whole lot, okay?"

"......Yes, ma'am."

......Wait, isn't this degenerate after all?