元陰キャの巨乳ヤリマン妹がエロすぎて、お兄ちゃんはもう…!!

11月 10, 2025

価格660円

販売日:2021年06月19日
作者:元陰キャの巨乳ヤリマン妹がエロすぎて、お兄ちゃんはもう…!!
サークル名:ゐちぼっち
シナリオ:
シリーズ:元陰キャの巨乳ヤリマン妹がエロすぎて、お兄ちゃんはもう…!!
年齢指定:
作品形式: おっぱい妹学生ビッチ中出しツインテール巨乳/爆乳ムチムチ

作品紹介
垢抜けて可愛く変貌した妹に欲情してしまう兄と、
そんな兄をイジって弄ぶビッチな巨乳妹のお話です。

マンガ本編38ページ。
サンプルはモザイク修正ですが、本編は黒棒修正です。

■あらすじ

俺には2つ歳の離れた妹がいる。
地味で陰キャな妹に、俺は全く関心が持てなかった。

だけど、妹は変わった。

本の代わりにスマホを持ち始め、化粧を覚え、髪型や服装も派手になり
まるで別人のように可愛くなった。

それどころかマッチングアプリにも手を出し
男遊びにもハマっている様子だ。
突然オンナになった妹の事が、最近妙に気になってしまう……。

そんなある日、リビングで昼寝をしていた妹の
無防備にさらされていたエロすぎる身体に俺は性欲が抑えきれず
胸や尻、更にはマンコを好き放題にまさぐり
下着を脱がせて生マンコをオカズにオナニー……!!
大量のザーメンをためらいなく妹にぶっかけてしまう。

その夜…ふと目を覚ますと、さっきの仕返しにと
俺の寝込みを襲って妹がフェラチオしている―――!?

「妹に欲情とか、正直キモいよ？ｗ」と挑発してくる妹を
無理やりクンニでわからせようとするが、俺は先に射精してしまい…

「妹に負けたまんまじゃ悔しいでしょ？」と
マンコを差し出す妹のエロさに耐えきれず
俺たちはお互いをイカせ合う激しいセックスを始めてしまった――!!

■作者

一宮夕羽（Twitter:@yu_ichinomiya）

The big-breasted slut sister who is a former yin girl is so erotic that her brother is already…!!

Work introduction
An older brother who is lustful for his younger sister who has transformed into a sophisticated and cute girl.
This is a story about a bitchy big-breasted sister who plays with her older brother.

Manga main story 38 pages.
The sample is a mosaic correction, but the main version is a black bar correction.

■Synopsis

I have a younger sister who is two years older than me.
I had no interest in my plain and secretive sister.

But my sister has changed.

I started carrying a smartphone instead of a book, learned how to make up, and started wearing flashy hairstyles and clothes.
She became cute, like a different person.

On the contrary, I started dabbling in matching apps.
It seems that she is also addicted to playing with men.
Lately, I’ve been feeling strangely curious about my younger sister who suddenly became a woman…

One day, my sister, who was taking a nap in the living room,
I couldn’t control my sexual desire as my body was so erotic that it was exposed to the naked eye.
Explore her breasts, butt, and even pussy as much as you like.
Make her take off her underwear and masturbate her raw pussy…!!
He doesn’t hesitate to spray a large amount of semen onto his sister.

That night… when I suddenly woke up, I wanted to get revenge for earlier.
My sister is attacking me while I’m asleep and giving me a blowjob!?

My sister who provokes me by saying, “Honestly, it’s disgusting to have lust for my sister, isn’t it? lol"
I tried to force myself to understand by cunnilingus, but I ejaculated first…

“Wouldn’t it be frustrating if you just lost to your sister?"
I can’t stand the eroticism of my sister who offers her pussy to me.
We started having intense sex that made each other cum!!

■Author

Yuu Ichinomiya (Twitter:@yu_ichinomiya)

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