Yunseop is the picture-perfect student body president, a model student adored by his peers, respected by his juniors, and favored by his professors. Beneath his flawless campus facade, however, lies a heavily guarded secret: he manages his overwhelming stress through intense solo pleasure. His pristine reputation shatters when Gyeongdae, a gloomy, normally invisible junior who blends into the background, catches him in the act. Instead of spreading rumors, Gyeongdae makes a startling proposition, offering his silence on one condition: Yunseop must become his private sex partner. Forced into a secretive arrangement to protect his status, Yunseop reluctantly agrees. However, he quickly realizes that the quiet junior is far more dominant behind closed doors. As Gyeongdae introduces him to intoxicating, mind-melting pleasure, the dark dynamic begins to consume Yunseop, leaving him hopelessly addicted to the very person he once overlooked.