While Taking Care of My Shut-In Little Sister, I Somehow Ended Up Ejaculating Inside a Beautiful Girl - Chapter 7: While Living My Usual School Life, I Somehow Got Accused of Two-Timing (Part 3)

Chapter 7: While Living My Usual School Life, I Somehow Got Accused of Two-Timing (Part 3)

≪Morning! Sorry about yesterday, okay?≫

My phone buzzed with an incoming message.

Usotsuki-chan was sending texts with her usual vibe, as if nothing had happened.

≪I’m on my period right now, so…≫

≪I was feeling off after school yesterday too.≫

≪Might’ve been a bit too harsh on you guys.≫

≪So, as an apology, thought I’d let you hear my voice first thing in the morning~♡≫

≪Don’t worry! I won’t tell Yuu-chan! lol≫

≪Ren-kun? You’re reading this, right? Reply already.≫

≪Kidding, kidding. Honestly, I just want to talk to you.≫

≪Can I hear your voice?≫

≪Just for a bit.≫

≪Talking to you makes me feel a little better.≫

≪Just a quick chat, even for a second.≫

≪Please?≫

≪Pretty please?≫

≪Can we call now?≫

≪Is it okay to call?≫

After a brief pause, the screen showed green and red buttons for accepting or rejecting a call.

An incoming call from her.

“H-Huh?”

When I answered immediately, her voice sounded surprised.

“What’s up? You’re being awfully cooperative today.”

Her happy laugh came through, but the usual mischievous, energetic tone was subdued.

“Usotsuki-chan.”

“W-What?”

I could practically hear her jump through the phone.

“You okay?”

“What do you mean?”

As expected, she brushed it off.

“…”

“Uh… um…”

A long silence. I didn’t hang up, just let the quiet build tension. Usotsuki-chan seemed flustered, muttering something under her breath.

“Just a bit longer. Hang in there.”

I said that and ended the call without waiting for a reply.

It’s been three days since I learned about the two-timing rumors—and met Nijouin from Yuu and Usotsuki-chan’s class. Today’s Friday.

What does it mean to love someone?

I’ve been thinking about that all morning.

Not just friendly affection or liking someone as a person or friend.

Romantic love.

Loving someone as more than just another person.

Wanting to be with them, to be bound to them.

What happens when you feel that way?

How do you act?

What do you accept, and what do you reject?

What do you affirm, and what do you deny?

How do you change, or stay the same?

[Class A’s Yakko Tsukimi is doing enjo-kosai.]

Malice spreads unchecked, a rumor meant to ruin one person growing to bare its fangs at those around them.

[Class B’s Hoshimiya is dating Onodera Yuu but also going out with Tsukimi Yakko.]

The rumors turned on me the other day.

And now…

[Nijouin Reiko is doing enjo-kosai.]

A meaningless string of text from an unknown sender, its truth unclear.

“Another nasty one…”

I muttered, reporting the spam email. A copy was sent to the security company, and the original went to my trash folder.

“…”

The vicious rumors kept spreading.

My conviction grew stronger—my doubts, deeper.

I’d planned to let Yuu handle the information-gathering and stay out of it myself.

That was the plan, but—-

*

After school, I heard the distant shouts of club activities and the sound of instruments as I stepped into the classroom.

I’d watched a certain person repeatedly step into the hallway, look around, and return to the classroom. I made sure they didn’t spot me before approaching.

The classroom was empty except for that one person—everyone else had gone home or to clubs.

The room was bathed in a faint sunflower yellow as the setting sun slanted through the windows.

“If this were a different time, what you’re doing could get you killed.”

“Pfft.”

My warning was met with a dismissive reply.

“You should stop. You won’t be able to come back from this.”

“Whatever.”

The girl brushed off my dramatic phrasing with a cold tone.

She sat on a desk by the window, ignoring me as I approached, staring out at the schoolyard where a light rain had fallen.

Her skirt’s hem wrinkled as she sat, her legs dangling in the air.

The tips of her short, brown bob swayed slightly.

“Mizuno. I’m saying it one more time. Stop.”

This time, it was a warning.

“—Fufu.”

The girl—Mizuno—let out a short, mocking laugh.

It was derisive yet somehow fragile, tinged with reckless aggression.

“Hoshimiya, right? So you do like Yakko-chan?”

“What does that have to do with anything?”

“Oh? Dodging the question means it’s true—”

Mizuno turned, smirking, her eyes narrowing into crescent moons.

Her gaze was impossible to ignore, and it carried an intense sense of wrongness.

Her small frame and cute features should’ve inspired protectiveness, but looking into her eyes betrayed that impression.

The vibe we got from each other probably wasn’t great.

It couldn’t be helped, given the nature of our first conversation.

“The only one I like is Yuu. She’s my girlfriend, so that’s obvious.”

“Even though you’re two-timing?”

“That’s just a rumor.”

Mizuno nodded with a “hmph.”

“I’ve been watching from a distance, but you’re kind of weird too, aren’t you?”

A loaded comment. But she didn’t bother hiding its meaning.

“What a coincidence. So am I…♪”

Her eyes. That gaze.

The unease I felt earlier solidified into a concrete discomfort, grating on my nerves.

Her eyes weren’t like Yuu’s, with their deep, abyssal shine.

Nor were they like Usotsuki-chan’s, bold and mocking.

“I don’t mind weird people. As long as they don’t get in my way♪”

Her eyes were just… endlessly, deeply black.

“Why do something… no, this kind of thing?”

I pulled up the email from my trash folder—the one likely sent to multiple people this morning—and showed it to her.

She glanced at it and looked up at me with a coy expression.

“That’s a nasty email, huh? It came to me too.”

“…”

I stared at her silently, and she let out a short laugh, jutting her chin defiantly.

“So what?”

“Just curious how the sender thinks.”

I added, “Oh, and this too,” pulling up a photo I’d secretly taken earlier.

“This is your doing too, right?”

“Wow, what a dirty notebook.”

She didn’t seem surprised. I hadn’t gotten a confession, but it was clear—she was the source of this mess. My next steps wouldn’t change.

I had no intention of asking why. Her motives were already clear enough, and the issue was Usotsuki-chan’s situation and the rumors about me. My goal was to stop more from spreading.

“Well, I get it now. You’re the type who won’t admit fault easily.”

I turned off my phone’s screen in front of her and deliberately placed it on the desk nearby, where she could see it.

“So? You kept me here after school just to talk about this?”

“Yeah. I was hoping you’d stop. The bullying of Usotsuki-chan.”

“Bullying? That’s harsh—I was actually helping to keep those bad rumors from spreading.”

Mizuno played innocent, acting like she’d been a supportive ally.

“Sure, pretending to be a friend and betraying them from the inside is the most effective way. Especially to corner someone lonely who just wants connection.”

“Betrayal? That’s a bit much…”

“It’s a shockingly simple trick. I mean, it’s easy, right? For example—”

According to a student in Class A who heard it from Mizuno, she’d said something like, “There’s a rumor that Yakko Tsukimi is doing enjo-kosai, but you don’t believe it, right?”

It’s a basic setup. Just spreading a rumor like that, true or not, makes it spread like wildfire.

Whether someone feels positively or negatively toward Usotsuki-chan, as long as they’re interested, they’re primed to become a carrier for the rumor.

“—That’s how it works, right, Mizuno?”

“…”

It’s cruel, but that’s all it takes to start a rumor. Truth or lie, if it’s juicy, it spreads in a flash.

By pretending to be a concerned ally, the rumor flows so naturally it’s almost unnatural.

This info came from Yuu. Over the past three days, she gathered bits and pieces from Class A students, and from the exponential spread of the rumors, she was sure this was the main method.

“You’re saying I did that?”

“Still playing dumb?”

Facing Mizuno’s attempt to feign ignorance, I slammed my fist on a nearby desk and stepped closer.

The unexpectedly loud bang made her flinch for a moment, but she held her ground, looking up at me with a mocking smile.

“Gonna make me talk with violence?”

“That’s not my plan. If you’d just stop bullying Usotsuki-chan, I wouldn’t have to say anything more.”

“…”

Maybe she sensed something in my calm demeanor despite the aggressive gesture, because her expression stiffened slightly.

“You’re talking about rumors, but you can’t prove I’m bullying anyone, can you?”

“Even with all this evidence?”

I pointed to my phone, reminding her of the photo.

“That notebook and textbook? They’re still at Usotsuki-chan’s house.”

With a shrug, I gave her a condescending look, as if exasperated.

“The police are impressive when they get moving. With physical evidence, they can trace the tools used and their origins in no time. For this kind of evidence, it’d probably take less than a day. They’re not clueless about suspects, and they don’t need to tiptoe around the environment or people involved.”

“The police?”

Mizuno snorted.

“Of course, there are ways to investigate without the police.”

Her eyes widened in surprise at that, then narrowed as she spoke.

“That’d cost time and money, wouldn’t it?”

She’s not wrong.

“Maybe. But it’s not impossible, and if you won’t admit it, I’ll have to do it. Honestly, I would do it.”

I spoke as if reasoning with her—you can imagine I’d go that far, right?

“If you like the thrill of being tailed by a pro you’ve never met, I’d be happy to fund it with my measly part-time job money.”

I implied I’m crazy enough to do it, that normal common sense doesn’t apply—an idea she must’ve picked up on just moments ago.

Even if a detective wouldn’t be noticed, the thought of being followed would stress out a teenage girl like Mizuno, turning her daily life into a pressure cooker.

Sure, minors can’t hire investigators directly, but there are plenty of ways around that, like going through an adult.

“…If you could pull that off, who are you, Hoshimiya?”

She forced a smile to hide her unease, feigning composure while showing curiosity about me.

Ignoring her, I continued calmly.

“Soon, the teachers will call you in for a talk. If you don’t stop then, I’ll resort to those methods. That’ll make things messy, which I’m sure you don’t want.”

“Trying to negotiate?”

“Maybe. If you don’t agree now, fine. You can admit it later when things blow up and leave a bigger scar. Or you can admit it now, swear to stop bullying, and it won’t even leave a mark.”

“…”

As I spoke matter-of-factly, Mizuno crossed her arms, deep in thought.

She stared into the void, not out the window.

She might be considering the option I gave her—to let it all be water under the bridge if she complies.

“Mizuno, I’m telling you—”

Before I could urge her again, she cut me off.

“Oh, and don’t get the wrong idea.”

She pulled her phone from her skirt pocket.

“I’m recording this.”

She showed me an app capable of voice recording.

“Don’t try anything funny.”

“Same to you.”

“What, you seriously think that? That exchange just now could be seen as blackmail, you know. Maybe you’re the one in a bad spot right now.”

With a thin smile, Mizuno held her phone away from me, stepping off the desk to put distance between us.

“Are you admitting to bullying Usotsuki-chan and spreading malicious rumors?”

“So what if I did?”

Surprisingly, Mizuno suddenly got bold. Eyes wide, lips twitching, she spoke with conviction.

“You get the situation, right? If I edit this to just the part where you’re threatening me and post it, you’re the one who’ll look bad.”

She sounded certain, as if she’d turned the tables.

“What’re you gonna do?”

“So what do you think I’ll do?”

“Huh…?”

My response must’ve been so baffling that she frowned, looking confused.

“Did you think I’d grovel and apologize? Feel ashamed of my shallow thinking? Or maybe cry and regret getting into this mess? What do you think?”

“What… are you even talking about?”

Maybe I asked too many questions at once. It seemed she hadn’t thought her actions through deeply or had any clear plan.

“…Whatever. I said it’s about whether you comply, but honestly, I’m not sure you even have a choice.”

“What? What’re you going on about?”

Mizuno, shaken by my calm words at this stage, faltered.

“No helping it.”

I’d hoped she wouldn’t think I’d confront her without a plan, but…

“You can come in now.”

“—!?”

She whipped around in shock as I signaled toward the classroom’s back entrance.

The door slid open with a rattle, revealing two girls.

“Hey, Mizuno-chan. Been a while since PE, huh?”

“Good day, Mizuno-san. You seem as lively as ever.”

It was Yuu, who’d earned the title of top student and one of the school’s prettiest girls, and Nijouin, whose looks were just as stunning but who sat at the bottom of the class hierarchy. Two girls who rarely spoke in class and weren’t particularly close stood together.

Even Mizuno, usually carefree, couldn’t just tilt her head at this.

“What’s… going on…?”

Unable to grasp the situation, she let out a bewildered voice, her mind spinning without trying to hide it.

She never would’ve guessed I had people waiting in the hallway, out of sight.

Mizuno had been wary of someone possibly lurking, but she was clearly caught off guard.

She probably didn’t expect me to be this prepared.

Seeing her panic, Yuu flashed a cold smirk before turning to me with a straight face.

“Ren-chan, your signal was late.”

“Sorry. I wanted to drag it out a bit.”

I’d hoped Mizuno would realize her situation, admit her mistake, apologize, and stop bullying Usotsuki-chan on her own.

This girl, Mizuno, had the chance to do that.

It might seem like I was expecting too much from her, but given the seriousness of the situation, it was reasonable.

“Making us wait like this… Ren-chan, you’re way too kind. But, well, that’s part of what makes you great…”

Yuu sighed in exasperation as she walked toward the back of the classroom.

By the way, every classroom in our school has lockers at the back, the same for every grade and class.

They’re not locked, and students aren’t encouraged to keep valuables in them. So, people use them for small study supplies or stuff they’re too lazy to take home.

Maybe because of that lax attitude, or because some got warped over time, a few lockers don’t even close properly. You could call it a sloppy look.

One of those lockers, its door half-open with a gap, caught Yuu’s attention.

She walked over and pulled a smartphone from it.

“Recording audio? That’s cute. This kind of thing needs to be videoed, Mizuno-chan.”

She said it casually, almost as if it were obvious, while tidying up the locker’s contents.

She rearranged the items—set up to prop the phone—to their original places, minimizing any inconvenience to the locker’s owner (whoever that was).

Call it restoring the scene or a quick cover-up of evidence.

“This is Class C… How did someone from Class A…?”

Mizuno muttered her question, visibly shaken, as Yuu finished retrieving the phone. Holding it, Yuu pointed the camera at her and approached.

“Hey, Mizuno-chan.”

From behind the phone, Yuu’s face wore a pasted-on smile.

That fake smile was proof she was furious beyond reason.

“Just give up already. How long are you gonna keep Ren-chan tied up here? How long do you expect me to put up with this?”

Her exasperated tone was laced with anger.

Her abyssal eyes glinted black in the light streaming in from outside.

Compared to them, Mizuno’s dark, deep eyes seemed a shallower shade of black.

“You’re seriously getting in the way.”

“…!!!”

Yuu’s clear voice, dripping with murderous intent, made Mizuno freeze and tremble.

“Ren-chan told me. You’ve been spreading rumors about Tsuki-chan and bullying her, right? That itself? I don’t really care.”

Yuu leaned in so close it was almost like she might kiss her, their noses nearly brushing, and whispered.

“But spreading lies like Ren-chan has a thing for Tsuki-chan? That was a big mistake.”

Yuu’s words were slightly off-target.

But the rage in her tone was practically murderous.

Mizuno, startled, tried to resist being overwhelmed by that aura—

“Ghh—!? What!?”

“What are you doing? That’s dangerous.”

—But Yuu easily grabbed her wrist as she raised her arm, stopping her cold.

“Ow…! It hurts…!”

“Violence isn’t okay, right?”

“…!?”

Mizuno, terrified and trembling, was held up by Yuu’s grip on her wrist. Despite their similar builds, Yuu’s surprising strength left Mizuno unable to resist, amplifying her panic.

“S-Stop… It hurts…!!”

Overwhelmed by Yuu’s advance, Mizuno could only let out incoherent whimpers as she was pushed back onto the desk.

Her wide, terrified eyes locked onto Yuu without blinking.

It was an instinctive reaction, not wanting to miss a single move from her opponent out of fear.

“Hey, Mizuno-chan. Didn’t you notice? You were talking like Ren-chan was the one in your way earlier. But you’re the one in the way. You’re the one messing things up. You realize you’re wasting the precious after-school flirting time for me and Ren-chan, right? Do you wanna die? Like, right now?”

“Eugh… ah…”

The honor student, the cheerful, popular girl—her true nature.

Mizuno, face-to-face (literally) with a side of Onodera Yuu she’d never seen, was so shaken she couldn’t speak.

I’d set the stage, rattling her before pushing her off the cliff, but Yuu’s intensity was maybe a bit too much.

…Also, I’m the one who suggested using after-school time for this. “Flirting time”? Does Yuu realize how wild (and embarrassing) that sounds…?

I didn’t know she was that excited for after school… Sorry, Yuu.

Her role was supposed to be revealing the recording and the witnesses, but she was going a bit off the rails. If this kept up, I’d have to step in.

“Hey, Mizuno-chan.”

Mizuno, leaning back heavily on the desk, her legs dangling and trembling unconsciously in the air.

Yuu bent over her, looming.

She tucked her phone into her blazer pocket and slammed her hand on the desk beside Mizuno’s head.

“You’re in the way, you know?”

“Eek…!!”

In a “desk-donut” instead of a “wall-donut,” Yuu’s voice, low and chilling, seemed to rise from the depths of hell.

“Don’t get in our way anymore, okay?”

“Ugh… uhh…!”

Tears welled in Mizuno’s eyes.

Seeing that, I decided it was time to stop—

“Hey, Yu—huh?”

More tears.

…Wait, was that… her crotch?

I didn’t hear anything, but a certain smell hit me, and I noticed Mizuno’s condition—

Yuu, me, and even Nijouin, who’d been silently watching, were all stunned.

“Uwaaah…”

Mizuno covered her face with both hands, sobbing.

Liquid trickled down her legs from under her skirt, soaking into her loose white socks pulled down to her ankles.

“Nooo…”

Mizuno cried pitifully.

Seeing her like that, Yuu, Nijouin, and I exchanged looks with the same expression.

“““…”””

She’s crying…

A mix of helplessness, pity, and regret swelled inside me.

As we calmed Mizuno down, Yuu handed her tissues, and Nijouin and I grabbed rags to clean her soaked lower half, the desk, and the surrounding floor.

When we finished, Nijouin, who’d been comforting Mizuno, sighed with a troubled look, crossing her arms under her ample chest and glancing at me.

“So, what now?”

“Hmm, well…”

Honestly, in this state, it felt hard to keep leading things.

In other words, Mizuno’s next steps weren’t mine to decide anymore.

“Hey, Ren-chan, can I take it from here and wrap this up?”

“Be my guest.”

I was curious what Yuu planned to do with her generous offer, but—

Later, I realized her suggestion was, coincidentally, similar to what I’d been about to propose.