Idol School is a reality girl group survival show. The program aims to form a 9 members girl group out of 41 female participants, training them in singing and dancing in the span of 11 weeks.

Lee Jae-In possesses a good appearance, he is smart and comes from a wealthy family, but he is also arrogant. His grandfather orders Jae-In to enter into a 10 month contract engagement with a female school teacher that he has never met in his life. Lee Jae-In slowly falls in love with her.