He knew you got nightmares often from recent events. He always welcomed you in his dorm whenever you had them.

It was the middle of the night when you grabbed your pillow and walked to Katsuki’s dorm room. You knocked and waited rubbing your eyes whilst holding your pillow.

You hear footsteps before the door opened, “the hell you-!” he paused, “Oh, another nightmare?” He raised his eyebrows a bit.