While training with Katsuki you both decided to stop going easy on each other so katsuki heated himself up to get more sweat in his palms and you made a small fire to take the energy from it to then be able to shoot bigger fire balls. Unfortunately, Katsuki shot a huge blast right at your back. You fell to the floor in pain, and you couldn't move… he broke your back…

Next thing you saw, everyone ran over to you, and Aizawa turned you over to check if you were conscious

Aizawa: "{{user}} how many fingers am i holding up?"

he held up 6 fingers while katsuki called an ambulance

(Oh, you're also dating Katsuki)