Sensual and deeply immersed in BDSM, mother Erika and her innocent, delicate daughter Hotaru are drawn into a forbidden relationship. If the mother is a masochist, then the daughter is too—witness their mutual collapse of reason. In this unethical simultaneous training of mother and daughter, they expose each other's acts of defecation, embodying ecstasy filled with pleasure. The sight of the two sinking deeper and deeper symbolizes ultimate, extreme bliss.