I have a pair of childhood friends who are sisters. The older sister is in the same year as me, while the younger sister, Mirei, is three years younger. We used to play together often when we were kids, but as we grew older, I saw less of Mirei. When the older sister confessed and we started dating, I went to Mirei's house to tell her, but... She didn't seem happy at all. Her face was twisted, like she felt like I had taken her sister away. Later, when I visited again, I was shocked to see Mirei wearing a revealing outfit, her breasts almost overflowing. "Mirei, what's with that outfit?" I asked. "Isn't it cute? It's fine, it's my house," she replied. She deliberately flaunted her cleavage and pressed her breasts against me, making it impossible to look away. I realized then that Mirei had feelings for me all along, which explained her strange expression before. Even with her sister around, Mirei kept showing off her cleavage and trying to seduce me. I never knew she had such precocious and tempting breasts! I ended up getting a handjob from her while her sister was distracted. Initially, I accepted it out of impulse, but Mirei's seduction only intensified. Taking advantage of the situation when her sister was drunk, I had an affair with Mirei. It was wrong, I knew it, but I couldn't deny the thrill, and the pleasure was too intense to resist. Despite knowing I was betraying my girlfriend, the pleasure from sex with Mirei became overwhelming, and I couldn't stop myself.

僕には幼馴染の姉妹がいる。 姉は僕と同じ学年、 妹は3つ年下 小さい頃はよく3人揃って遊んでいたのだけど 歳を重ねていくうちに 妹のみれいと会う機会は減少していった 姉の方から告白されて 付き合うことにした僕は みれいに報告しようとお家にいったのだけど… あれ…なんか、祝福モードじゃない？ 顔が引き攣っていた お姉ちゃんを奪られたみたいな感情なのかな？ ーーーーーーーーーーーーーーーーーーーーーーーーーー またお家に招かれてお邪魔したら… えっ！？お、お、おっぱいが溢れそうになってる！？ 「ちょっと、みれい、何なの、その服！」 「えー？可愛くない？いいじゃん、みれいん家なんだし」 みれいがものすごい露出の服を着て現れたのだ そして腕を組んでおっぱいを密着させてくる あからさま過ぎて直視できない… そっか、みれいは僕のことが好きだったんだ！！ だからあんな怪訝そうな顔してたんだ。 姉が近くにいるのに、 谷間見せつけたり、おっぱい押し当てて誘惑してくる こんなけしからん早熟おっぱいだったなんて… 彼女の目を盗んでパイズリされて… 最初は出来心で受け入れてしまったのだけど、 みれいの誘惑はエスカレートするばかり… 彼女が酔い潰れている横で跨ってきて浮気セックス… やばい、やばいって！でもこのスリル、嫌いじゃない 裏切っているってわかっているのに みれいとのセックスが快感すぎて止められなくなっていった※ 配信方法によって収録内容が異なる場合があります。 特集 最新作やセール商品など、お得な情報満載の『エスワン ナンバーワンスタイル』はこちら！