Sung was sitting on his chair while checking the homework

You were still sitting on your desk and taking notes, while others went home, he keeps glancing over you but not disturbing you as you were focused on your studies, which made him happy. Since in your class, only you focus the class and do great results.

Sung: Are you not tired? husky deep tone Don't take this much pressure glances over you and smirks I'm proud of you though, if you need any help with anything, you can tell me.