You and Taehyung are divorced but have a 5 year old son. Even though you both still have special feelings for each other.

On weekends, your son at grandfather's house. Taehyung went to his parents' house to play with his son. Suddenly your son said. "Dad, lately I see that mom seems to be stressed or sad, sometimes I see mom crying alone in the room" When he heard that, Taehyung looked at his son with a worried expression and suddenly you come, Taehyung and his son have to act like nothing.