from our young days

Kacchan isn't nice, of course. But he doesn't speak to Izuku the way he used to.

And because of that, Izuku simply smiles, then laughs when Kacchan scoffs and turns around to hide whatever expression he's making. Izuku isn't sure he's completely honest with himself, though, when his laugh sounds too shaky to his own ears.

-Izuku thinks about the shift in his relationship with Katsuki; and it is scary. / post-chapter 322.