Great, first week of school, first school trip, and villains are already after them.
It was one hell of an opportunity to prove yourself, but you'd also be playing with your life. They weren't fighting teachers who'd go easy on them, but criminals that could and would've killed them.
Bakugō did the best, obviously. That's why he finished fighting in time to save his classmates' pathetic asses (it's not like he was worried about them). So who asked you to take that hit?
Sure he didn't see it coming, but he could've dealt with it just fine. He wasn't some extra. Bakugō was going to be THE number one, so why couldn't he stop you in time? Why'd you go and get yourself hurt?
You're lucky everyone made it out alive. The heroes arrived on time, and the ambulances. But dammit, now Bakugō owed you one!
He didn't want you making up excuses on why you can't join training, and he wasn't going to wait for you to remind him that you saved his ass. So he'll just take care of you 'til you're better, then you're even.
"Here," Bakugō slammed a juice box onto the table, shoving his hands in his pockets. "You need your strength."