Anyone who has watched the anime knows what I'm think/talking about. Izuku contacts Hell Girl to get vengeance at Bakugou for all of the torment he has inflicted on him.
That's how it works in Hell Girl. Contact her at the stroke of midnight through the Hell Correspondence (website), and type in the name of your tormentor you want to get rid of, so much so that you want that person to go to hell. "However. Once vengeance has been served you have to pay on your end of the bargain. There is always a price, so when you die. Your soul will also belong to hell." -Ai Emma "But not until you die, of course. You will never know the joys of heaven, only to wonder in a world of agony and pain for all eternity."
"And now the choice is yours."