My Sex Friend Is My Childhood Friend?

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Chapter 11: The Object of Revenge

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The next day, I couldn’t stop thinking about Mahiru even while I was working. I was thinking about the present and about the past.

I first met her when we were in elementary school. Maya was athletic and popular with everyone. By the time we were in middle school, she excelled academically and in sports, and I think she was pretty popular with both boys and girls.

I, on the other hand, was an overweight anime otaku, full of insecurities. Some of the guys would still hang out with me, but the girls treated me like I was a germ. Whenever they saw me, they’d wrinkle their noses and back away like they were looking at something filthy, saying stuff like “gross” or “he stinks.”

But Maya was different. She was kind to me, even then. Maybe it was because we lived close by, but she’d come by my house every day, and we’d walk to school together talking about anime. She even said my body type was “cute” and treated me like a normal person.

I liked Maya. I really did. But I was so full of inferiority and self-doubt that I was too afraid to tell her how I felt. At some point, Maya suddenly started acting moody and began avoiding me.

Then one day, I overheard something I wish I hadn’t…Maya… She was talking with our classmates behind my back. One classmate was speaking with a mocking look on his face.

“That fatass… Right? Don’t you think so too, Maya?”

Maya looked annoyed.

“Seriously gross.”

She was definitely talking about me. At that moment, I felt like an insect swatted out of the air and slammed into the ground.

I had trusted Maya more than anyone and yet, she betrayed me. I barely remember what happened after that.

From that point on, I completely ignored her. Even when she came to walk me to school, I wouldn’t go with her. When she spoke to me, I pretended not to hear. Eventually, I stopped trusting anyone—male or female.

After graduating from middle school, I moved far away due to my family’s circumstances. Even in high school, my distrust of people never healed. Within half a year, I stopped going to school.

Somehow, I scraped by with make-up exams and remedial classes and barely managed to graduate, but going to university was out of the question. Back in middle school, I was better at studying than anyone. university should have been a given for me, but I ended up wasting my high school life and I couldn’t even go to university.

It was all that girl’s fault.

While I was dwelling on the past, whatever lingering feelings I had for Mahiru vanished. Now, all I could think about was how to get back at her.

She hasn’t realized who I am… Right? If she has, that would be a problem. How should I take revenge? Treating her like an object might give me a little relief.

Should I make her spread her legs and masturbate in front of me? Or order her to have sex with another man?

Just thinking about it made me irritated.

Why the hell am I the one always paying for everything? She’s probably doing compensated dating or something, right? She’s got money, so maybe I should start making her cover everything.

The dark resentment inside me began to boil over. Disgusting, sadistic fantasies wouldn’t stop flooding my mind.

…Phew.

I took a deep breath. Well, whatever else, she had a pretty face, was obedient to me, the sex was good—she was still the perfect setup for a sex friend. Besides, the more I thought of her as the girl I hated, the more turned on and possessive I got. That was a fact.

I’ll keep using her as my sexual outlet, at least until she realizes I’m her childhood friend or until I get sick of her.

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Chapter 12: And the Object of Revenge…?

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The day of my promise with Mahiru arrived. When I picked her up in the car, she happily opened a book and showed it to me. Apparently, she had picked out some shops she wanted to visit from a magazine.

“I was thinking we could go here together…”

I waved my hand to stop her. Mahiru clasped her hands on her knees, bit her lower lip, and looked down.

“…I’m sorry.”

After that, I didn’t give her a chance to argue and drove straight to the hotel. I roughly stripped off the stylish clothes she had probably chosen carefully for today. When Mahiru tried to take a shower, I stopped her. With her necklace and earrings still on, I handled her roughly, skipping foreplay and finishing inside her as if it were only natural.

It must have hurt. Mahiru’s face contorted in pain. Noticing something was off with me, she averted her gaze, her eyes tinged with fear.

“…Did something bad happen?”

I answered irritably.

“Yeah.”

Mahiru looked down, whispering something softly, then spoke with resolve.

“It’s okay. Use my body however you want. Maybe then the kind Onii-chan will come back.”

I didn’t respond and treated Mahiru like an object for my desires. Mahiru was too submissive. It only made me angrier. I grabbed her hip with my left hand and forced my fingers inside.

“It hurts…”

Mahiru furrowed her brows. Looking down at me, she said again.

“It’s okay. But… It’s my first time there, so… Please be gentle.”

Of course, I didn’t have that kind of fetish. I just wanted to hurt Mahiru.

Will she even accept this?

My frustration reached its peak. I pulled my fingers out and grabbed her throat. I didn’t intend to actually harm her. Deep down, I probably thought if I went this far, she’d reject me. I thought she’d reveal some filthy, betraying true nature.

I tightened my grip. I could feel the sensation of her cervical vertebrae in my palm, and the pulse of her carotid artery, warm and alive, under my thumb. She must be struggling to breathe by now.

I could feel the strength draining from Mahiru’s body. But her reaction was nothing like what I expected. Mahiru looked at me with weak, almost loving eyes.

“…It’s okay. If it makes you feel better, it’s okay.”

With that, she closed her eyes.

What the hell is wrong with her?

At that moment, I snapped back to reality. I let go of Mahiru’s throat. She coughed, gasping for air frantically.

What am I doing?

“…Sorry.”

I muttered as I sat on the edge of the bed, pressing my right hand to my mouth. A deep ache in my chest gave way to sobs, like hiccups.

Am I crying? Why? I can’t forgive Maya, so why do I feel guilty about Mahiru?

Mahiru wrapped her arms around my head. Her chest pressed against my face, and I could hear the comforting sound of her heartbeat. With her eyes closed, she comforted me.

“It’s okay.”

Hearing her voice, my suppressed sobs came flooding back. Seeing this, Mahiru gave a faint smile.

“You’re such a crybaby. If you’re a bad boy, Onee-san might have to tease you~”

With that, she slipped under the blanket.

“Hey, wait.”

I tried to stop her. But Mahiru poked her head out and stuck out her tongue.

“If you don’t cheer up, Onee-san will make you cheer up by force if I have to.”

She straddled me. Maybe our bodies had gotten used to each other. Despite my intentions, I

slipped inside her effortlessly. Mahiru hugged my head and began moving gently back and forth.

“It was scary earlier… But… Ah. Onii-chan’s inside me, spreading, going wild. Mess me up until you’re satisfied… One more time, inside…”

I couldn’t hold back and let go. I looked up, but with Mahiru holding my head, I couldn’t see her face. Her breathing, though, sounded pained, almost like she was holding back tears. Seeing her like that, I couldn’t bring myself to hurt her anymore.

The Mahiru in front of me now was too different from the Maya of my past trauma. Hurting Mahiru wouldn’t bring closure to my feelings. Before I knew it, Mahiru was patting my head.

Wait, she’s comforting me now…

Mahiru asked me.

“Hey, is there something you want me to do for you?”

Ah, that’s right.

“Then, from now on, call me ‘Master.’”

This was my small act of resistance after being softened by her comfort. Mahiru looked a bit surprised.

“Hmm, so Onii-chan is into that kind of thing.”

I felt a bit embarrassed. Mahiru smiled brightly, sat on the floor in a seiza-like position, and looked up at me with moist eyes.

“Okay, Master. I’m your obedient slave. Feel free to make all sorts of naughty requests, okay?”

Apparently, my request was interpreted as something sexual.

Well, I won’t deny it.

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