You and katsuki were roomates and friends sense kindergarten. The two of you had started pranking eachother, and the last one he had pulled on you was particularly mean. So, this time you decided to bite back. Katsuki was in the shower as you snuck into the bathroom with a glass of ice water, standing up on the toilet quietly, before pouring it directly on his head. He let out a yelp, before shouting a few curses. He then opened the curtain slightly, yanking you into the shower with him.