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…!! 3

3月 14, 2025

価格880円

販売日:2023年04月21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: おっぱい妹学生恋人同士中出しツインテール巨乳/爆乳ムチムチ

作品紹介
晴れて妹の菜月と恋人同士になった翔太。関係は良好でHも順調。
しかし菜月が魅力的なあまり、他の男に取られるのではと翔太は少し心配で…？

「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…!!」(RJ331393) シリーズの4作目です。
本作だけでもお楽しみ頂けますが、内容が気になった方は過去作や番外編も合わせてお楽しみ下さい。

マンガ本編53ページ＋おまけ1ページ。ヒロイン黒髪の差分バージョンが付属しています。
サンプルはモザイク修正ですが、本編では黒棒修正です。

作者：一宮夕羽（Twitter:@yu_ichinomiya）

【あらすじ】

陰キャで地味子だったのに、急に垢抜けて可愛くなった妹の菜月。
そんな妹が男遊びを繰り返す様子に俺はムラムラして、つい手を出してしまった――。

紆余曲折があって、妹に恋人になって欲しいと告白した俺は妹と正式に付き合うことになった。
人には言えない関係だが、上手く行ってる…と思う。

週末にクラスメイトと海に行くという菜月。
水着を選んだ店の試着室や、そのままラブホテルでHをしたり…。
妹の反応とカラダがエロすぎてヤバい……!!

翌日、妹の浮気が心配で海水浴に付いていく俺。
友達と仲睦まじく遊ぶ姿にホッと胸を撫で下ろすが、帰りの車内で妹に図星を突かれてしまう。

「私、お兄ちゃんと恋人同士になれて毎日幸せだよ？」
卑屈になりかけていた俺は妹のその言葉に奮い立たされ、改めて妹を守り抜く決意を固めるのだった。

「お兄ちゃんが頑張ってるとこ…今夜たっぷり私に見せて……」

The big-breasted slutty sister who is a former introvert is so sexy that her older brother is already…!! 3

Introducing the work
Shota has finally become lovers with his younger sister Nazuki.The relationship is good and H is doing well.
However, Shota is a little worried that Natsuki is so attractive that he might be taken by another man…?

This is the fourth installment in the series, “The former introvert, busty, slutty little sister is so sexy that my older brother is already here…!!" (RJ331393).
You can enjoy this work alone, but if you’re interested in the content, please enjoy it as well as past works and extras.

53 pages of the main manga + 1 bonus page.A differential version of the heroine’s dark hair is included.
The sample is a mosaic correction, but in the main story it is a black bar correction.

Author: Ichinomiya Yuu (Twitter:@yu_ichinomiya)

[Synopsis]

Natsuki’s younger sister, who was an introvert and plain girl, suddenly became sophisticated and cute.
I got aroused by how my younger sister was playing with men repeatedly, and I couldn’t help but put my hands on it.

After many twists and turns, I confessed that I wanted my sister to be my lover, so I officially started dating her.
It’s a relationship that I can’t tell anyone, but I think it’s going well.

Natsuki goes to the beach with his classmates on the weekend.
They have sex in a fitting room at a store where they chose swimsuits, or in a love hotel…
My sister’s reaction and body are so sexy that it’s crazy…!!

The next day, I went to the beach, worried about my sister’s affair.
He is relieved to see him play together with his friends and sympathizes with his heart, but on the way home, his younger sister hits him with Tsuboshi.

“I’m happy every day to be lovers with my older brother?"
I was almost sensible, but was inspired by my younger sister’s words and once again made up my resolve to protect her.

“Your brother is doing your best… Show me plenty tonight…"

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