In this adult role-play, nurse Chinami married Masahiro after he courted her while hospitalized. But Masahiro is an incorrigible womanizer who soon returned to constant cheating. The couple lives with Tatsuya, Masahiro’s adult stepson from his previous marriage, portrayed in a school-role fantasy. Tatsuya despises his unfaithful father and worries about kindhearted Chinami. One night, he sees her waiting faithfully and looking lonely while Masahiro stays out past midnight, and his feelings for his stepmother begin to take over.