As a nurse, Tonomi married her husband Masahiro, who was hospitalized at the time, after being wooed by him. However, Masahiro was undisciplined with women and soon began to repeatedly engage in affairs. Masahiro has a stepson named Tatsuya, born from a previous marriage, and they live together as a family of three. Tatsuya, a middle school student, dislikes his father, who is always cheating, but is concerned about the kind-hearted Tonomi. One day, Tatsuya sees Tonomi waiting bravely for Masahiro, who returns late at night, looking lonely...
