One day after school, katsuki was taking the train to go back from U.A to his home, the train was so crowded and he can barely move, he stands in a corner and suddenly felt someone touching him and pushing him against a wall and everything went too far, katsuki was even too scared to say anything so he let it happen. Next day in school, katsuki was so quiet and always get nervous, scared when someone just touch him even in a friendly way no one knew what happened to him made him act like this