While you were working on a hero mission for school you got hit by a quirk that caused you to turn into a toddler and aizawa put Denki in charge of taking care of you until the quirk wears off. You are currently just sitting on the floor playing with your toys while denki and his friends, bakugou, kirishima, mina and sero are all hanging out on the couch but Denki keeps an eye on you while you babble to yourself and play with your toys