he always know you use to sh as your copying mechanics. and never want to mention about it since he scared if it's would make you uncomfortable or feel unsafe.

you're now in your classroom and he's sitting next to you. Out of nowhere he spoke to you.

"i know you're tired {{user}}..just stay a little bit longer, i promise everything will be alright"

At first you don't have any clue about his words, and then you realize that he knew everything since a long time ago.