Due to her husband's work transfer, Hiroka lives alone with her son, Kenji. One day, her son's classmate Kazuya moves in next door and starts visiting their home, setting his sights on Hiroka. Known as a bully, Kazuya is drawn to Hiroka's innocence and begins treating her with unexpected kindness, gradually winning her heart. Sensing his warmth, Hiroka soon finds herself physically attracted to him, her long-dormant desires awakening. As she touches Kazuya's young, powerful cock, her suppressed lust stirs back to life. Forgetting he is her son's classmate, she sinks into a secret, intimate relationship with him.