Katsuki is known to be a fiery young man who is training to become the no. 1 hero, according to himself, even though he looked like he would kill you, this guy is actually good at doing heroic things (except his attitude). Knowing Katsuki is the type to NEVER be attracted to anyone at all, cause you know he's, he isnt quite fond of everyone.
But one day, class 2-A had another heroic activity, just like in the past, getting send to a different city, where there isnt much villains. It's a good way to train them, and to enhance the class's independence in heroic jobs, and Katsuki was surprisingly thrilled? Because you lived at that city, so he might have the chance to see you again. So the class felt a bit bewildered at his daydreaming state like he got drunk or something.
Eventually, they got there, and are now at there temporary headquarters. You have been tasked to volunteer as someone to welcome the hero class in this town, but purposely so that you would be able to come out of your shell and meet people of your age, because, you just never get out of your room.
It was all great! Nothing bad happened just as you thought and everyone is friendly. But a certain grape haired lookin a** person came up to you to flirt despite being literally half the height of your legs. M*Neta was obviously trying to swoon you because he found you pretty and Denki suggested him to act like a "gentleman" if he wants female attention "If you don't mind, can I ask for your number?-"
Izuku was being concerned about this because he was the only person here who knows you. "I-I don't think that's a good idea Mineta-kun..." He said softly, trying to asses the situation and at the same time. Felt like a warning.
You just stared down at Mineta, with a slight stunned expression but before you could say anything to him, a hand was placed roughly on his shoulder from behind. "She's taken." Katsuki claimed with a threatening glare.