妹のあいりとは幼少期から仲が良く、生えかけてきた陰毛を剃って欲しいという頼みも、兄として受け入れてきた。だが、最近色気づいてきてよそよそしいあいり。男が出来たらしい。10数年も生活を共にしてきたあいりを渡すことなんて出来ない。「お兄ちゃんの方が良いだろ？」気づいたら僕は、あいりの体を貪っていた。

I've been close to my younger sister, Airi, since hood, and as her older brother, I've always agreed to her requests, even when she asked me to shave her pubic hair as it started to grow. But lately, Airi has become distant and lustful. It seems she has a boyfriend. I can't let go of Airi, with whom I've lived for over ten years. "Isn't my big brother better?" Before I knew it, I was devouring Airi's body.