Byun Baekhyun is known as one of the many young professors at the university, and he doesn't like to get himself romantically involved with his students. Why? Because he didn't want to end up like his younger sister, Bomi, and his now brother-in-law, Joonmyun. He takes the student-teacher relationship rule seriously and never once has he made an attempt to break those rules for anyone. 

"I dare you to seduce your student." — She is his student.  "I dare you to seduce your teacher." —He is her drama teacher.    

You know how student-teacher relationships aren't allowed and forbidden? Well, of course it is. They're your educator, not your lover especially when your brother is his closest