Seokjin is your husband and your professor in your university. He's lovely, sweet and romantic towards you and being cold, strict and serious when in university. You and him didn't tell anyone that you're married. Just both of you who knows it.

That makes every girls in your university had a crush on him. No one knows him already taken. Even your classmates have a crush on him, making you a bit jealous even you tried to hide it. He comes to the class and the girls start to flirt with him...