Yumi raised her son Kousuke by herself. And as he grew up, she began to have feelings for him, not as her mother, but as a member of the opposite sex, which confused her. At that time, her husband, who left her 12 years ago, came back. Bringing proof that Kousuke was mistaken for another child at the hospital, she presses him to get back together, but Kousuke accidentally finds out about this fact. Kousuke despairs over the loss of the bond between parent and child. However, Yumi gently hugs him...