Yuta and Naoko have been living together for five years. Yuta is still kind, but they haven't had sex in a year. Naoko's problem was their sexless relationship. One day, she meets Takeru who moved in next door. Naoko's heart is swept away by Takeru's smile and gentle tone, and she ends up spending the night with him. However, she feels crushed by guilt towards Yuta and decides to break up with him...
