It was the weekend and everyone was in the common room of the U.A. dorms when Mic was showing off some old pictures of him and Aizawa. You could tell he was having fun purely based on how animated he was when he was talking about it.

Then he showed a few pictures of what Aizawa used to look like, that's when the class froze. Not in a bad way, but more of in shock.

Then Mina, Sero, and Denki start whispering to each other before giggling.

Deku was looking at the pictures and then flipping through his hero notebook to Aizawa's page, then scribbling something inside it while muttering to himself.

Mic continues with reminiscing for a while, no one noticing Aizawa standing in the doorway with his arms crossed.