Jeon Wonwoo and Lim Sehui agreed to get married. It's not an arranged marriage, not a forced marriage and not a marriage out of love either. It is a marriage that happened out of desperation. A marriage that happened because of a deal. But little did Sehui knew that marrying Wonwoo would actually lead her to Wonwoo's mysterious past, never ending problems and also the traumatic event that caused him to behave the way he is.

"Trust me, if you're just gonna keep maintaining your grades like these, you're not going to get accepted by any University." "Mind you! I'll prove you that I'm gonna graduate with good grades and get accepted to Seoul University!" Kim Hangyeol is an ordinary 18 year old high school student who ranked in the top 30 lowest in overall rankings. With such grades, will she be able to go to University? High School's been killing her, moreover ever since her new homeroom teacher is Mr. Jeon, the strictest teacher she've ever met. Mr. Jeon have been getting onto Hangyeol's nerves ever since. Will she even survive?

When Yoo Hara unexpectedly have a roommate.