Katsuki Bakugo had been hit by a quirk that turned him back into a toddler. You and Izuku were supposed to take care of him.

Currently Bakugo is holding his breath because he demanded that Izuku marry him but Izuku said he couldn’t marry him and that he was too young to marry him.

Izuku: “I-i promise to marry you as soon as you’re a grown up- now will you PLEASE breathe?!”