Chinami, a nurse, married Masahiro after he pursued her while hospitalized. Masahiro soon returned to his womanizing ways, and the couple now lives with Tatsuya, his adult son from a previous marriage. In this adult family role-play, Tatsuya despises his cheating father and worries about kindhearted Chinami. One night, he sees her waiting sadly for Masahiro, who still has not returned home late at night, and decides to approach her.