During summer vacation, I decided to stay at my older brother's house for a month. My older brother and his wife, Ai-san, are close friends and have known each other since we were kids. What's more, Ai-san used to date me before she got married. I was really looking forward to seeing her again. As expected, Ai-san still looked beautiful and innocent. It wasn't long before our passionate desires took over, and we started secretly touching each other whenever there was even a moment alone. The thrill of sneaking around only intensified our relationship.

学校が夏休みの1か月間、僕は兄貴の家に遊びに行く事にした。兄貴とは仲良しで結婚した藍さんも僕たち兄弟と幼馴染だ。しかも、藍さんは昔、僕と付き合っていた事があり再会が楽しみだった。そんな藍さんは相変わらず綺麗で無邪気で、僕は気持ちを抑えられなくなった。藍さんも同じ気持ちで僕たちは兄貴がすぐ傍にいるのにイチャイチャするようになった。一瞬でも隙があれば、声を殺し密かに弄り合うスリル…それが余計に僕たちの関係を熱くさせていったのだ。