Kim Da-in, a college freshman who has lived her school days diligently and passionately, dreams of a perfect campus life with flawless grades, friendships, and credentials. However, Da-in experiences her first humiliation when she enters college alongside Kang Da-in, who shares her name but, unlike her, possesses both perfect looks and personality. She then starts her freshman life walking alongside Nam Bo-young, who dreams of having a perfect appearance, and her college experience takes a completely unexpected turn… Will Da-in be able to live a perfect youth as she had planned?