My Little Sister Is the Best F*p Material - Volume 4 Chapter 3: I Feel at Peace When We Sleep Together

Volume 4 Chapter 03: I Feel at Peace When We Sleep Together

After my date with Yamamoto-san ended with her tormenting me for pleasure but denying me release, I somehow managed to calm my arousal on the bus ride home.  

Today’s my turn to cook. The fridge is looking pretty bare, but I didn’t bother buying anything extra.  

“Onii-chan, you’re back. Welcome home.”  

As I stood idly in the kitchen, Miyu, who’d been packing her things by the door, came into the living room. She’s leaving for a trip tomorrow. Her luggage is just a tote bag’s worth—apparently, her clothes and such are already prepared at her destination. I wonder what kind of luxurious trip she’s off to.  

“I’m home, Miyu. Finished packing?”  

“Yep. I’m getting hungry, so I’d love to eat early.”  

“Alright, give me a minute to whip something up.”  

All I’ve got left is cheese, onions, and some meat. Thanks to the high-wattage oven Miyu made our parents buy, I’ll just sauté everything and turn it into a gratin.  

While I cooked, Miyu sat on the sofa, fiddling with her phone. It’s rare for her to be so glued to her screen—she doesn’t usually text her friends that often.  

“What’re you doing?”  

“Majomaru.”  

“Majomaru? …Wait, that’s the app I used to play!”  

“Yep. I got a rare pull, so I’m hooked now.”  

Classic gacha game addiction. I don’t know about the big companies, but some games apparently predict your gender and age based on your playstyle and make certain characters easier to get.  

Miyu kept playing the game until I finished cooking. It’s so strange seeing her so into a game—she used to complain whenever I played.  

She sits up straight on the sofa, holding her phone delicately with both hands. She looks as cute as a squirrel nibbling on a nut.  

I wonder how far she’s gotten. It’s killing me. I quickly transferred the ingredients to a baking dish and popped it in the oven, then casually grabbed my phone and moved closer to the sofa. Sensing my presence, Miyu looked up at me, startled.  

“Onii-chan, Onii-chan!”  

She showed me her phone screen. It displayed her Majomaru user ID.  

“Let’s be friends.”  

Friends—that’s one of Majomaru’s game systems. By becoming friends, players can share resources and help each other out. Once the request is accepted, you can even lend your characters to your friend.  

I started playing only a few days before Miyu, but thanks to Suzuhara’s tips, I’m way ahead of most players. In the early stages, my characters are practically overpowered. Whether Miyu finds that fun is up to her.  

When I searched for Miyu’s ID, a user named ‘Miyu’ popped up.  (T/N: Miyu here is written in actual english, Miyu)

“Level 25, huh? You’ve made decent progress.”  

“I’ve been playing ever since I tied up Yuka, even while waiting for you.”  

So even after being so mad, she can focus completely when the person’s not around. My sister’s got an ice-cold heart, I tell you.  

“You’re free tonight, right? Let’s play together after dinner.”  

“Sure thing.”  

After watching her play for a bit, I set the finished dinner on the table and called Miyu over. We sat across from each other. Starting tomorrow, we won’t share meals like this for a whole week. It’s good that I can focus on Yamamoto-san’s “sister detachment” therapy, but it’ll be lonely without anyone at home.  

“Where are you going this year?”  

“Hokkaido. The flowers are supposed to be beautiful, so I’ll take a walk. And eat, a lot.”  

“That’s what you’re doing for a whole week?”  

“There’s more to it than that.”  

Miyu blows on her gratin and scoops it up with a spoon. She answers casually, but basically, she’s spending a full week getting it on with Haruka.  

“You’re staying at a ryokan(inn)?”  

“Apparently, it’s a villa.”  

Villa… That’s rich people talk. It’s nothing like the trips I know.  

“Haruka’s family must be loaded.”  

“Haruka’s family is normal. It’s the ladies she met through work who are rich. Actually, it’s just weird people with too much money. Even the local driver is one of those women.”  

If they’re touring Hokkaido’s vast lands, a car is a must. Office ladies funding a trip for two teenage girls… What kind of oddballs are they?  

“What does Haruka even do for work?”  

“Uh… modeling, I guess. I can’t say more.”  

“I’m not going to investigate or anything.”  

“It’s not about that. Just don’t get interested in Haruka.”  

Miyu stubbornly refuses to let me know anything about Haruka. Even after everything, that hasn’t changed.  

Human nature makes you want to uncover what’s hidden, but Miyu’s my savior, so if she hates it that much, I’ll drop it.  

“What about you, Onii-chan? What’re you doing over summer break?”  

Typical question from Miyu. Figured it’d come up.  

“I’ve got some shifts at work. After tomorrow, I’ll be with Yamamoto-san… What I do in the second half of break depends on how that goes.”  

“Not meeting up with your guy friends?”  

“I plan to. Just not worth mentioning as a big event.”  

There’s an offline meetup in the works, but I’m still debating whether to go.  

“It’s not like going out during break makes you special.”  

Miyu finishes her gratin and gently sets down her spoon.  

After dinner, we sit side by side on the sofa. After spending time with Yamamoto-san, Miyu’s petite frame feels even more noticeable. She’s so adorable, I could wrap her up in a hug. I want to touch her, completely unrelated to any sexual desire.

I leaned back against the sofa, watching Miyu play her game with perfect posture. Her sleek black hair, running parallel to her back—it’s the kind of silhouette I’d find myself staring at if I saw it on the street. Though, more often than not, when I pass by and sneak a glance at their face, they’re not my type.  

But my sister here? She’s flawless, from her face to every detail of her body. The fact that I can call someone who takes such good care of herself mine is purely because I’m her brother. I can’t forget how lucky I am to live with her like this.  

“Onii-chan, which characters should I focus on?”  

Miyu showed me her roster of characters. She’s got some rare ones, no doubt.  

“If you balance healing and attack types, you’ll rarely lose. Though, most of them are strong with Animal Evolution.”  

“Ugh, but I want to make them magical girls!”  

Miyu grumbled as she tapped the evolution button. The evolution screen showed her the branching paths, including the magical girl form she wanted. Apparently, the fox animal character, ‘Yoko,’ is her favorite.  

Majomaru has two evolution paths: magical girl and animal. Both are cute and deformed, but girls always prefer the magical girl evolution.  

Pushing too hard won’t make it last, and I don’t want to lose these moments of talking about hobbies with her. Unless you’re as efficiency-focused as me, it’s best to let her play her way.  

“Then check out this site—it’s got strong character combos. You could focus on building a team to support Yoko. That might be fun.”  

“Hmm, got it.”  

Miyu’s smart and efficient, but when it comes to games, there’s this ‘game sense’ that raw intelligence can’t fully compensate for. She’s starting to get the hang of it, but this is one area where experience reigns supreme. Looks like I’ll be her senior for a while longer.  

We kept playing, and when her phone battery died, she grabbed the charger and continued for another two hours. I started worrying she’d get tired, but her enthusiasm never waned.  

“Having you around makes it easier to clear tough quests, so my level’s rising fast…”  

“Early on, leveling up restores stamina, so you can keep retrying quests.”  

The friend feature has two aspects: you can use one character from a registered friend, or borrow multiple characters from nearby players.  

In gacha games where you acquire characters, if player skill dominates, only a few characters end up being used. So the system is designed to ensure attacks always land somewhere. This gives healing and defense characters a purpose, meaning borrowing just one character won’t let you clear the hardest quests in Majomaru.  

“Don’t you need a break?”  

“I’ll take a bath then. You can clear the dishes while I’m gone, Onii-chan.”  

“Got it.”  

Miyu hurried into the changing room. When we were kids, she’d get so grumpy whenever I played games. People really change with age.  

I cleared the dishes, then followed her into the bath. Not wanting to keep her waiting, I quickly finished up, dried my hair, and changed into my pajamas. Miyu was in her room, so I knocked. The door opened right away.  

“Brushed your teeth?”  

“Not yet.”  

“Then go do it quickly.”  

“Yes.”  

*Click.*  

The door shut mercilessly. I brushed my teeth as told. Miyu was all set—she had nothing left to do but play games or sleep. Guess she wants me to do the same.  

After finishing my bedtime routine, I visited her room again.  

“Teeth are brushed now.”  

“Then head back to your room.”  

Looks like we’re continuing in my room. No matter how close we get, she’s still hesitant to let a guy into her room, even if it’s her brother.  

As I sat on my bed, Miyu came in and naturally sat beside me, holding her phone and a pillow.  

“Why the pillow?”  

“I’m getting up early tomorrow.”  

Right, but usually, when your wake-up times differ, you’d sleep separately.  

“Last time I slept with you, I fell asleep so easily. So I’m sleeping here tonight.”  

“I see.”  

She didn’t even ask for my permission—guess she knows I wouldn’t refuse. Of course, I have no reason to. Well, I *do* have a reason, but not in this atmosphere.  

“Are you bored when you play Majomaru?”  

“Not bored, but my action gauge doesn’t fill up as fast as yours. I play PC games on the side.”  

“Adult games?”  

“You sold all those, remember?”  

“Oh, right.”  

If she’d just sold them, I might’ve bought new ones out of frustration. But my sex life is so fulfilling now, I don’t need them. Haven’t used anything but Miyu as my ‘material’ in ages, so I don’t even browse erotic images online anymore.  

“Speaking of why I started Majomaru, Suzuhara invited me to a gaming meetup. I’m not too keen, but I figured it’d broaden my hobbies, so I restarted gaming for now.”  

I used to play online RPGs mainly. When the game first launched, certain characters were overpowered, so I honed my skills to compete with top players.  

But in the end, games are all about money. I got tired of trying to bridge that gap and stopped. Still, the habit of spending time on games stuck, and since Suzuhara recommended it, I’ve been playing eroge nonstop.  

“Then I’d like to see you play PC games sometime.”

Miyu’s familiarity with gaming had sparked her interest in PCs, which I was happy about—it meant we had more topics to talk about.  

She held both my phone and her own, playing a solo multiplayer mode. She looked like a proper gamer. I logged into an online game and joined a random party. There wasn’t much conversation, just me and Miyu sharing the room while playing our respective games. It felt like what an offline meetup with online friends would be like.  

After a while, Miyu came over and sat beside me. Still, she just stared at the screen, declining when I asked if she wanted to play.  

Feeling her emotionless gaze on me, I completed the story quests. About an hour later, I noticed Miyu sitting on the bed, hugging a pillow.  

“Going to sleep?”  

“Yep. You should get some early sleep too, Onii-chan.”  

Miyu patted the bed. I was tired too, so I figured I’d sleep early. Especially since my adorable sister was inviting me—I couldn’t refuse.  

I shut down the PC, got into bed, and Miyu snuggled in beside me. I dimmed the lights, and as my eyes adjusted, I could clearly feel the warmth of our two bodies under one blanket.  

Facing inward, our eyes met. Her fair skin glowed in the moonlight, her perfect features even more beautiful. I’ve had intimate moments with my sister countless times, all triggered by our unique body chemistry. But why am I sharing a bed with such a cute girl?  

“Is it okay if I snuggle up?”  

“Huh!? I-I mean, yeah, it’s fine…”  

Miyu pressed against me, closer than ever before. Unlike before, there was no gap between our lower bodies. Her legs entwined with mine, her warmth slowly spreading across my entire body. So warm, so soft.  

This is weird. She’s way too forward. I know my presence messes with her self-control, but this feels… too couple-like.  

Miyu’s head rested perfectly under my nose, her hair’s scent unavoidably tickling my nostrils. Her stretchy night bra and thin pajamas did nothing to conceal the softness of her breasts, even through the fabric.

Miyu’s body is slender but with just enough fat in the right places. Holding her, I could feel her delicate bones. As I pulled her closer, she pressed against me even more. Guess that’s consent.  

Naturally, my lower body heated up. The softness of our pajamas made every sensation vivid—my erection, the contours of her intimate area. I couldn’t stop thrusting my hips against her.  

Still, Miyu slept soundly, her breathing steady. She must feel at peace when I hold her. Last time we slept together, I fell asleep strangely quickly, but tonight, I wasn’t tired enough yet.  

Holding Miyu tightly, I shamelessly rubbed my groin against her sensitive spots. I couldn’t see what was happening below—her large breasts blocked the view even when I created a small gap. But I could feel her breasts deforming against my chest, visible even through her clothes.  

I wore just a shirt and shorts. Maybe it was my imagination, but I could feel the hardness of Miyu’s nipples. I was rubbing against her sensitive areas, both above and below, yet she didn’t complain. Guess she’s asleep.  

But I couldn’t control myself. I kept grinding my pelvis against her. Forbidden from ejaculating by Yamamoto-san, I couldn’t stop rubbing myself against my sister.  

“Ah… Miyu…”  

I savored Miyu’s body, my desire spiraling out of control. No matter how wrong it was, I couldn’t stop. Miyu couldn’t have expected me to hold back. Even if Yamamoto-san scolds me again for my lack of self-control, I couldn’t resist this.  

“Haa… haa… haa…”  

Clothed, I pressed my soft skin against her firm body. The sound of fabric rubbing in the silent room was obscenely erotic. I was grinding my erection against Miyu’s clit, her most sensitive spot—somewhere I’d never been allowed to touch. The fact that I was doing it now was incredibly arousing.  

I was on the verge of ejaculating. If I kept going, I’d soil my pants again. Despite knowing I shouldn’t release, my hips moved wilder. At the very least, I had to finish with my own hands.

“Ahh, haa… Miyu… Miyu… aaaah!”  

I pushed myself to the brink of ejaculation. I could still hold back. I’d rub against Miyu’s intimate area until the very limit, then pull away.  

“Mmm… Onii-chan…? What are… ahh… mmm, fuaaah…!”  

Just as I was about to stop, Miyu woke up. Her sudden, sultry voice in my ear triggered the ejaculation I’d been holding back.  

“Ahh… this is bad…!!”  

I quickly flipped onto my back, lifting my clothes to avoid the mess. My erect penis shot its load, splattering inside my clothes and soaking my stomach.  

“Onii-chan… you used me to ejaculate without permission didn’t you…”  

I managed to avoid staining my clothes, but Miyu looked furious. She’d realized I’d used her intimate area. Her moan, however brief, gave her away.  

Once she understood it was just my impulsive act, she huffed, turned away, and buried herself in the blanket.  

“Umm, Miyu-san…”  

My hands were busy holding up my clothes to avoid the mess. Unless I gave up and let them get sticky, I was stuck.  

“Could you… help me clean this up?”  

“No way. It’s your fault.”  

Miyu pouted, rolled over, and clung to my arm as punishment. Closing her eyes, she resumed her steady breathing.  

Was she seriously planning to spend the night like this? I admit, ejaculating without permission was wrong. But at least let go of my arm.  

After Miyu fell asleep, about five minutes passed. I couldn’t move a muscle. If only I didn’t have the blanket, I could lift my shirt and quickly wipe the mess.  

“Mmm… ugh…”  

Miyu shifted her grip, whining. She wasn’t fully asleep yet. After a while, she opened her eyes and glared at me.  

“You ruined my sleep, Onii-chan.”  

“Sorry…”  

She seemed bothered by the hardness pressed against her thigh, squirming her legs unhappily. I thought I’d angered her again, but she sat up, lifted the blanket, and started taking off my clothes.  

“Ugh. You made such a mess. Poor Yamamoto-san won’t get her share.”  

“S-Sorry…”  

Apologizing to Miyu was pointless, but if I told Yamamoto-san I couldn’t have sex because I ejaculated too much, she’d definitely be mad. That’s why she restricted my ejaculations at the net cafe. I need to stop ejaculating until I see her again.  

“Onii-chan’s a lustful idiot, and it’s so troublesome for his sister.”  

Miyu complained, “How much more of your semen do want me to drink?” but she swept her hair to one side, held it in her arm, and—as if it were the most natural thing—started licking up my ejaculate. Using tissue to clean it seemed like a foreign concept to her.

Miyu’s lips traced over parts of my body that no one else had touched, her rough tongue sending shivers through my sensitive nerves. There was no way my lust could remain calm, and my penis was as erect as if I were on the verge of ejaculating.  

“Nchu, chupu… Fuu.”  

Miyu cleaned up the semen that had splattered on my stomach, swallowing it all before exhaling softly. Yamamoto-san had been more thorough, yet Miyu’s casual handling left me even more aroused.  

“You made such a mess. What’s your excuse going to be if you can’t perform tomorrow?”  

Miyu asked, exasperated, while her fingertips teased my still-throbbing glans.  

I wasn’t surprised she was cleaning me up—I’d had nocturnal emissions before. But I’d assumed she’d just suck up the semen. Instead, she was licking me as if she wanted to pleasure me, even cleaning parts that hadn’t been touched by the mess.  

“If I said I wanted to ejaculate again, would you be mad…?”  

“Muu.”  

Miyu lay beside me, her sharp gaze piercing.  

“Actually, I’m already mad.”  

“Oh, right! Of course! I’m really sorry about that.”  

I’d used her body without permission—she had every right to be angry.  

“You always ejaculate whenever you want.”  

“I’m sorry…”  

“I told you to hold back this time, but here we are again. You do realize I’m your sister, right?”  

“I know, I know. I’m truly sorry.”  

Maybe she’d just wanted to sleep beside me for comfort. Instead, I’d let my lust take over again. Why can’t I learn from my mistakes?  

“Muu…”  

Miyu pouted but clung to my arm. She rubbed her thighs together and pressed her chest against me.  

“Miyu?”  

She’d suggested sleeping together because it helped her relax. Now that things had escalated, she had no reason to stay. Yet here she was, still by my side.  

Of course, I didn’t want her to leave. But why was she still here after all this?  

“Uuu…”  

Miyu pressed her middle finger into my sternum, hard. It hurt, but her behavior was more concerning. She fidgeted, clearly unsettled. This anger… it’s that kind of anger, isn’t it?  

“Why did you use my thighs…?”  

She pressed her body even closer. If I’m not mistaken, this isn’t anger—it’s arousal.  

“You made me like this. Knowing you’ll be with someone else tomorrow… it’s unbearable.”  

Her arm reached down, her hand grasping my erection without hesitation.  

“Ah, Miyu, what are you—ahh, aah…!”  

Miyu stroked my penis, her small hands just big enough to grip it. Her delicate movements hit all the right spots.  

“Haa, aah… Miyu, if you keep that up… agh, ah, aah, aaaah…!”  

Yamamoto-san’s technique was better, but Miyu’s touch was overwhelmingly more arousing. The fact that my sister was doing this to me fueled my desire like nothing else.  

Or maybe it was the situation—being forced to ejaculate by an angry Miyu—that I found irresistible.  

“Haa, haa, Miyu, I’m… going to cum…!”  

Miyu’s strokes quickened with my reaction.  

She’s ordering me to ejaculate.  

“Miyu, aah… I’m cumming, cumming… ah, ah, aaaah!”  

“Dopu, dopu,” my semen splattered onto my stomach again, so much that it reached my chest.  

“Miyu…?”  

“What?”  

Miyu just watched me ejaculate, her expression cold. But she’d made me cum with her hand. This time, it was unmistakably handwork.  

“Come to think of it, it’s been a while since I’ve seen you ejaculate like this.”  

“Oh, yeah, I guess.”  

Lately, I’d just been cleaning myself up, so she hadn’t watched me finish.  

Miyu sat up, tucking her hair behind her ear. She was going to clean me up again. But what if this made me aroused again?  

“Hamu… nyumu… chupu… jyu… mu…”  

As expected, Miyu started licking me. Just having her clean me up was arousing, and this was too much. My desire wouldn’t subside.  

“Ah, aah! There! Don’t lick there, it’s too much, agh!!”  

Miyu’s mouth moved to my nipples. If semen had splattered there, fine, but she seemed intent on keeping me aroused.  

“Are you that sensitive?”  

“Well… yeah… because…”  

I admitted that Yamamoto-san had developed my sensitivity there.  

“Hmm.”  

Miyu returned to my chest, sucking and licking my nipples.  

“Agh, an… ah, aah, ah…!”  

“You’re moaning too much. Did you make these noises with Yamamoto-san too?”  

“No, it’s… mmm… agh…!”  

Whether it was her experience or not, Miyu’s nipple play was far better than her handjob. I was completely at her mercy, drowning in pleasure.  

“Haa, haa, haa… I’m… going to… die… it feels so good…”  

“Whatever. Glad you’re happy.”  

Satisfied, Miyu lay beside me again.  

Her face was sullen, as if she hadn’t just pleasured me.  

“Umm…”  

After all this, I couldn’t pretend nothing happened.  

“Should I… do something for you too?”  

“I don’t know.”  

Miyu pulled down my shirt and clung to me like a koala. I took off my pants and adjusted to her position.  

“I’m sleeping.”  

She closed her eyes. Maybe she didn’t want me to touch her. But, embarrassingly, my erection was still rock-hard.  

After all that stimulation, it was impossible to stay calm. I still felt her lips and tongue on me. Just one more time… I wanted to ejaculate.  

Tomorrow with Yamamoto-san, I’d recover after a night’s sleep. I realized now: with Miyu, my libido and recovery were off the charts. She’d made me this way.  

“Miyu… just one more time…”  

I pressed my penis against her thighs again. Her body was hotter than before—she was aroused. A man’s desire isn’t just about receiving pleasure; it’s about giving it too.  

Miyu was still awake. No matter how much she scolded me later, I wanted to pleasure her with my body.  

“Nnah, Onii-chan… mmm…”  

As I pressed my shaft against Miyu’s core, a moan escaped her lips. She didn’t struggle, just clung tighter, her body yielding to mine. Her breath hitched, but she muffled her cries against my neck—her vulnerability was heart-wrenching, adorable, and utterly precious.

“Ahh, Miyu… Miyu… feels so good…”

“Mmph… hnn… ahh…!”

My hardness pressed against her folds. She felt it, reacted to it. The realization sent a tsunami of pleasure and euphoria through me, my thoughts dissolving into bliss.

When I thrust, Miyu lifted her leg, wrapping herself around me, her lower body seeking friction while her mouth buried in my neck, stifling her moans. Her desperate, loving grip was irresistible.

Her raised thigh exposed her core, my engorged member sliding along her crease—a friction akin to grinding. My need to release became unbearable.

Through our clothes, our intimacy continued. If we kept this up, our pants would be soaked.

“Miyu, I’m sorry, I… can’t hold back…!!”  

“Onii-chan, cum… it’s okay… just a little more… ahh, nnah…!!”  

“Miyu… ahh… haaah, I’m cumming… cumming…!!”  

I ejaculated again, “byu, byuru,” as I thrust against her. Eventually, Miyu’s grip tightened, then she went limp, releasing her tension.  

Only my breathing was ragged afterward. Miyu tried to hide her own heavy breaths.  

“Miyu… did you… cum…?”  

She covered her mouth and shook her head.  

“I’m sorry… want to try again?”  

She shook her head again.  

“Are you sure?”  

“Yeah. Girls don’t need to orgasm to be satisfied.”  

Miyu pulled the blanket over herself.  

“Forget all this happened, okay?”  

Impossible. If I could forget this, my life would be trouble-free.  

“I’ll brush my teeth again. You clean up. When I come back, we’re sleeping, got it?”  

Miyu adjusted her clothes, giving me a stern look. Despite everything, she still wanted to sleep beside me.  

When I returned from the bathroom, Miyu was already sleepy, rubbing her eyes. She lifted the blanket for me, and the mysterious sister who grows closer with every argument snuggled beside me again.  

Exhausted from our activities, I gently stroked Miyu’s fragrant, well-groomed hair until she fell asleep.