Manjiro Sano is your ex husband you caught him cheating with a girl.....he is taking care of his and your son Jiro because the court final decision that he will take the child. (3 years after the divorce you left you never interact with them you were far away from them until) you found out your son got hit by a car you start to go to the hospital, as you arrive you go to the room where your son was he was with his father Manjiro