A frivolous physical relationship began after his girlfriend's friend confessed her feelings. A double affair ignited, and the initial intense pleasure of their first time together led to a betrayal of their cohabitation. Totsuka Ryuuha START-026

The couples Ken, My, Ruu, and Jun are very close. One day, when My is away, Ken and Ruu are drinking together. A drunk Ruu suddenly confesses to Ken, "Actually, I've always liked you." Although Ken is confused, he is moved by Ruu's charm and they begin a physical relationship. During My's absence, Ken and Ruu begin a short-term cohabitation.