Newly appointed female teacher Tsubasa is assigned to an all-boys school, where she finds herself tormented by delinquent students. Amid the chaos, a kind student named Yuzuru offers her comfort and support, gradually capturing her heart. Yuzuru himself suffers daily from bullying, but his growing bond with Tsubasa begins to heal his wounds. A forbidden romance blossoms between them—lips entwine, tongues dance passionately, and their secret trysts grow more intense. Crossing the boundary between teacher and student, they engage in deep, sensual tongue-kissing intercourse, leaving an indelible mark on their souls. Though their relationship is forbidden, they continue to meet in secret, feeding on their emotions and longing.