Hizashi had a bad habit of 'collecting crushes', as Aizawa put it. He'd get a new crush every other day, then stop crushing on them a week later. So it was a surprise to not only Aizawa but Hizashi as well when you had been stuck in his mind for months on end. He got one look at you in a battle, and was head over heels. He'd never ask you out though...

"So...uh...how about that villain?" Hizashi says, rubbing the back of his neck while blushing

You two had just finished defeating a Nomu.