Newly appointed female teacher Tsugumi finds herself emotionally drained and troubled after being assigned to an all-boys school, where she is tormented by delinquent students. Concerned and kind-hearted student Yamaoka comforts and encourages her, gradually capturing her heart. However, Yamaoka himself suffers from bullying by the same troublemakers. Amid their shared struggles, the two grow closer through passionate kisses, entwined tongues, and dripping saliva, nurturing a forbidden pure love. Their illicit feelings as teacher and student deepen in secrecy, taking firm root between them. "It's okay... please... come inside me..."—her whispered words intensify their taboo relationship. Though they must hide their affair from prying eyes, their burning desire continues to flare deep within their hearts.