The first time I saw Gun's mother as a child, which episode?

The thirty-fifth episode is the thirty-fifth episode. When we met at the airport and saw our childhood, Gungun's mother was very happy. Mom also revealed that the more Gun likes a person, the more grumpy he is to whom. Not only that, my mother also talked about Gun blx, so she told her that when she was a child, she must not break up after quarreling, otherwise Gun would cut her wrist and commit suicide. The first time I met Gun's mother in my childhood was in episode 35.