Could love start from SEX?

After the divorce of her parents, Ari does not have it easy. Especially not when her father wants to marry another woman only a year later. Ari must absolutely prevent the wedding, and so she forges a plan: To show her father what kind of person his future step-son, Ritsu, is, she asks him bluntly if he wants to sleep with her. And indeed that night will change everything...