What do you do when your body gets switched with your crush’s?! Sang-yu is a painfully shy 18-year-old who has a crush on the class president, Darim. But there’s no way she’d ever return his feelings: Darim is popular, smart, pretty…and she likes their classmate, Ho-young. The three used to be friends when they were little, but a lot’s changed since kindergarten. All this gets jumbled when Sang-yu and Darim have a life-changing encounter at the neighborhood park. All of a sudden, Sang-yu and Darim have a lot more to talk about, and Ho-young finds himself feeling stirred as he watches the two grow closer.