A new transfer student has arrived in the class of the head of the student council, Kang Hyun-beom. The transfer student, who exudes a dangerous aura from the moment he appears, is the delinquent, Ban Tae- hyun, who was at the center of a fight witnessed by Hyun-beom's friend. Hyun-beom, with a sense of responsibility as a member of the student council, watches over Tae-hyun at every turn, and they gradually become close, and he wants to use this opportunity to rehabilitate Tae-hyun into a model student. However, as Hyun-beom approaches, Tae- hyun's heart begins to move in a different direction... Will he be able to guide this delinquent safely?