付き合っていると思っていた女の子に突然フラれた。二年もの間、僕は相手にとってただのセフレだったようだ。酷く落ち込む僕を見かねたのか、バイト先の後輩・ちなちゃんが慰めてあげると誘ってくれた。てっきり話を聞いてくれるもんだと思っていたら、どうやら少し違ったみたいで…その日を境に僕たちはセフレ以上恋人未満の関係に溺れていった。

I was suddenly dumped by the girl I thought I was dating. For two years, it seems I was nothing more than a casual sex partner to her. Seeing how depressed I was, my coworker, China-chan, offered to comfort me. I thought she would just listen to me, but it turned out to be a little different… From that day on, we became entangled in a relationship that was more than casual sex but less than lovers.