Yumiko embraces her son, whispering, "Let me comfort you." In response, her sexually frustrated son begins to comfort his mother. His motivation isn't mere desire, but deep affection and tenderness. Feeling his warmth, Yumiko gives in to this forbidden relationship. However, the son has inherited his mother's genes, possessing an insatiable libido—he craves her again immediately after climax. This endless cycle gradually erodes Yumiko's reason, dragging her deeper into a dark abyss.