Each day, Saebyuk finds himself becoming more fond of Kyungi, a high school student, as they wait for the bus. His feelings gradually deepen until he falls in love, but his affection is not returned. Suddenly, a change occurs when Saebyuk undergoes a hormonal imbalance and is transformed into a female. To his surprise, Kyungi shows interest in the newly transformed Saebyuk and becomes her friend.