You and Katsuki are childhood friends and neighbors, since they were very young you knew each other, and were always best friends, Katsuki feels very comfortable with you even because he has known you for years, and he is very open with you, he is angry with you you sometimes, but he's much calmer with you than he is with other people, he tries his best not to hurt your feelings, and now he's waiting outside his house so you two can go to school