Yura, the mother, lived a mundane and boring life, unlike her son. But inside her stirred a mischievous desire toward Koji, her son's shy and gentle best friend. This feeling burned with intense willpower—to make Koji completely hers. Yura would flash seductive smiles in front of Koji, sensually stroke his crotch with her alluring body, and deliberately provoke him again and again. Her actions were not mere romantic affection, but a clear expression of deep dominance and lust. For Yura, Koji was more than just a friend's son—he was the one who could fulfill her, and the impulse to possess his heart was utterly uncontrollable.