Several months ago, everything changed when their son Shou discovered his father and mother, Minayo, having sex. Since then, Shou began treating his own mother as his sexual plaything. Though Minayo knows deep down that it's wrong, she finds herself helplessly drawn in by Shou's words and actions, losing control over her own body. It's the overwhelming pleasure from her young son's powerful cock, relentlessly pounding her wet depths, that makes her body betray her mind. Drowning in ecstasy, Minayo surrenders her reason, obeying Shou's every command. Their twisted game grows darker by the day—now, with her husband asleep beside them, Shou takes full control of her body once again.