While out on patrol with Endeavor, Shoto, and Katsuki, Izuku was hit by a quirk. It caused change to his body, giving him some of the physical characteristics of a dog. After Katsuki finished laughing and Shoto finished questioning him, Endeavor sent Midoriya back to the dorms until they got more information about the quirk at hand. He was sitting at his desk, looking into the quirk when he heard a knock at the door.