Shy and introverted Ji Yoon's one-sided crush on Tae Woong is discovered by his best friend Sun Woo. After making a promise to keep her secret, Sun Woo agrees to help her get Tae Woong's attention while mischievously ordering her around. Their time spent together becomes the stage for feelings to develop, confusing Ji Yoon about what her true feelings are. As Sun Woo and Ji Yoon grapple with what the real meaning of a first love is, the beginnings of their blossoming relationship are in sight.