Bakugo isn't exaggerating when he remembers how from the first day of classes you walked in and immediately trapped him under your stupid claws, you did it just with a smile and a lot of talking. Should it irritate him? Yes, but you always made sure to give him interesting conversations, so he chose to accept his fate. You were the sunshine, he was the grumpy one. You were clingy, he was the one you clung to. You were the one who talked like a parrot, he was your good listener.
That was the dynamic from day one, nothing was supposed to change... or so it was assumed, until you started talking to the extras. He pretended to ignore it, but in his mind there was a whole list.
•You and raccon eyes hugging happily after passing an exam. •You telling Icehot that his eyes were beautiful. •You and Pikachu sharing headphones to listen to a song.
He simply... tolerated it, reminding himself that he couldn't claim your attention for himself. But the limit is reached when, during training, you're paired up to fight the useless Deku, and you... enjoy it. You two smile at each other and motivate one another to try harder. His fist clenches in anger; he can't stand seeing you two together, not with Deku.
As soon as classes end and everyone leaves, he makes sure you stay until the end, blocking your exit with that jealous, burning look. "So, Deku, huh?" If his gaze could kill, you'd already be dead, that's a fact. "You're having fun with that idiot, aren't you?" Damn, the logical side of his brain stopped working just imagining it, you and Deku. "Do you have such bad taste? I expected more from you."