Chapter 1 Sorry, Oni-chan!

Sorry, Oni-chan!

[I am sorry, Onii-chan…]

I heard the lewd voice of my stepsister, Akane.

My phone showed Akane’s obscene voice and disheveled clothes.

It was a shocking video sent to me a few minutes ago by the mother of a handsome third-year student.

… Ah, it looks like I got cuckolded. My sister, Akane, had an affair with her Senpai…

I met Akane when we were kids and had been lived together until now. We went to school together and always in the same class.

When in high school, we started dating and were recognized as an official couple by everyone around us.

But she started acting strangely in the second year of high school.

She was distant, or rather, she spent less and less time with me. I bit suspected she was having an affair.

…And the truth was revealed. Akane betrayed me, had an indecent relationship with a Senpai…

[Do you feel sorry for your brother?]

Senpai asked Akane while he laughing.

[ … a little.]

[Yes, because I can satisfy Akane better than him.]

[Ah uh, yes,… Senjo-senpai is more gentle,… and it feels good.]

[Akane is a pervert.]

[… nn, Senpai. Yes, it feels good there …]

What?

What is this?

Akane had a look that she never showed me.

She made happy and very messy noises.

Why, why …

Why did this happen?

Akane said that she wanted to marry me.

Was the smile, the hug and the time she kissed me a lie?

“Hey, Hayato-kun, this must have shocked you, but this is the truth.”

“Rumi, Rumi-san… but I…”

Rumi-san.

She is the biological mother of Senjo-senpai, a handsome third-year senior.

She was in her 30s, young, beautiful, and very neat.

And now, I had a physical relationship with her.

“It’s fine. Now you know the truth, don’t you?”

“… Yes. It seems my stepsister, Akane, was a terrible b🬀🬀ch.”

“Yes, I heard that she had relationships with several seniors.”

Shocked.

After hearing that, I could no longer trust Akane.

It was three days ago that Rumi-san told me.

Rumi-san gave me information that Senjo-senpai brought Akane to her house.

Honestly, I could not believe it.

Akane rarely had contact with any other guy besides me, and I thought she was in a serious relationship with me.

But I was always suspicious of her.

Now, when I was shown the video, my suspicions were confirmed.

Akane, she was no longer the Akane I knew.

Rumi-san seems to have raised Senjo-senpai on her own as a single mother. But lately, she seems to be feeling lonely and has become sexually frustrated.

I thought.

If Akane was taken from me, I would take Senjo-senpai’s mother, instead.

I had such a desire for revenge, but I was not that crazy. I genuinely thought Senjo-senpai’s mother was beautiful, and honestly, adult women were my type.

The expression on her face, which was full of hardship, made more beautiful, and her figure was slim. I thought she would be able to take me in with her ample br🬀🬀sts.

Oh yeah, that’s right.

Maybe I wanted a mother instead of a spoiled stepsister.

That’s how I got into a relationship with Senjo-senpai’s mother.