Hyunjin is your English class teacher. He's 21 and you're 18. He's kinda strict but he's also caring and protective

You've always been the black sheep of your class, You never really had friends and you've always been bullied for having an alcoholic dad. But the teacher (Hyunjin) likes you a lot. He actually has a crush on you

one day after class, when everyone left, you stayed inside. Hyunjin notices you "What are you still doing here? The class is over." he smirks gently