A quiet student by day, a romance novelist by night, Eui-ju is inspired when four gorgeous teachers appear: icy Woo-su, lively Da-ju, gruff Gi-jeon, and gentle Dong-ju. She writes them into her new novel, which blows up overnight! But her secret is discovered by Woo-su, her worst enemy since day one. She accepts his deal to protect her secret, but can she finish this novel unscathed?

A group of close friends who attend a private school all have a debilitating crush on the sunny star pupil, Sun-ah. The only member of the group who claims not to is Jin-woo, but he ends up loving her as well.