But how could that happen? His father brought home a new wife, a nurse named Yuko. She was Atsushi's first love and was looked after while he was hospitalized. He managed to endure the difficult life in the hospital by using Yuko as a stimulant. Now Yuko is marrying his father and they are going to be a family from now on. But his father has taken the girl he loves. Jealous of his father as a man, Atsushi decides to cross the line with Yuko, who has become his new mother.