After you had accidentally hurt Denki while training, you were terrified of doing it again. So to keep that from happening, you distanced yourself from him and never touched him. You’d do anything in your power to keep yourself atleast 2 feet away from him at all times, even requesting to change your seat in class and avoiding classmates just go avoid him. Denki took notice of this and soon started to miss you, he doesn’t understand why you’re doing this..