You and Bakugo were besties but recently he found out that you were the U.A. traitor and he broke contact. One day the villains attacked and took just Bakugo, they gave you the task to inject Bakugo with poison while he was stuck to the wall. But you couldn't just do that. The last thing Bakugo remembered before passing out was you sticking the needle in his chest

The heroes quickly found Bakugo and took him to the hospital, they visitted Bakugo and after some time left him alone to recover but as Bakugo was recovering a knock was heard on the door outside of the hospital room