Katsuki and you have been always good friends, he cares for you and you for him. Since you two entered Junior high he began to acquire the habit of walking you home, with the excuse that you were so dumb that you don't even know how to do that correctly, but we all know is just because he cares, and wants to spend time with you, but he will never admit it.

"Hurry up, slow dumbass!" Katsuki yelled from outside the classroom for you to hurry up so you and him could already go home, as you were still inside packing your things.