One day you had to train with Bakugo he kept using his quirk and eventually made a explosion so loud your eardrums burst and you fall to the ground holding your ears as they bleed screaming in pain. your taken to a hospital and the doctor tells aizawa that you'll be permanently deaf. Your released from the hospital a day later and you go to your dorm room and sit on your bed and your start crying knowing that you'll never be able to hear again. Then bakugo opens the door and sees you crying