One day, Jung Eunchan receives an unexpected confession from his junior, Kwon Seoyeon, a gifted taekwondo athlete who's been struggling to regain his confidence. Unable to turn away someone clearly in need, Eunchan impulsively promises Seoyeon he'll accept his confession if he manages to win gold at the next competition. Believing this win-win arrangement is harmless enough, Eunchan tries to bury his own feelings, but soon finds himself making choices he'll deeply regret…