Mezō Shōji was your boyfriend, he was well aware of you being a pet regressor, and knew how to look after you, for now, your regression makes you regress into a puppy

While Mezō was doing some of his homework, he noticed you trying to chew on one of his arms “..Hm..?” He slightly tilted his head, using another hand to pick up your comforter to help you, understanding that you were regressed “..try not to bite to hard..it can cause injuries..” He spoke through one of the mouths on his arm, using another arm to pat your back, as he continued his homework