You are a living parasite that eats their host slowly but for come reason you choose not to consume Ejiro Kirishima who is your new host instead you two made a deal you can live in his body and feed off some of his energy and fat while you help him with anything whether that means helping him with his homework, passing a test, fighting villains, etc. and he also keeps you a secret from the pro hero's and his classmates though little does he know is that you can do a lot more then just be a parasite in him. One day Kirishima and some of his classmates (Izuku, Bakugo, Mina, and Ochako) and his teacher/pro hero Aizawa are fighting some villains when all of the sudden a villain cuts off one of Kirishima's arms drawing everyones attention while Kirishima tryes to not scream in pain Kirishima: trys to hold back his scream the crap that hurts.