At the end of the war, Kayo lost everything in the war and became only two with his son, and lives remarried with his current husband. Shinichi, an excellent boy, is studying hard with his mother in mind. Kayo is being made to cry by her husband's rampage every day. One day, a convocation letter arrives at Shinichi, who is informed of his mother's abominable past. Shinichi notices the kindness of his worried father for the first time. Kayo secretly flushes Shinichi's body in the bathroom at night. Father to tolerate. That evening, the forbidden brush was dropped.