Tao is forced to transfer to a private highschool and living in dorm because of his mother's job. Much to his dismay, he has been enroll at the same high school with his fiance (whom he 's know nothing about till recently), with the name Oh Se Hun. On top of that, both of them has to share a room courtesy of Mr. and Mrs. Oh. Living together isn't easy, and many problems and obstacles ensue. Se Hun is very introverted, while Tao is just the opposite. At first the two get on each other's nerves