SAN-173 A young wife with large breasts, Hikaru Minazuki, became a wreck both physically and mentally due to being bullied by her in-law who needs care and has a huge dick, leading to neurasthenia.

``Hikaru'' is bullied by her stubborn father-in-law who requires the highest level of care, but she desperately endures and provides care. The husband, who cannot disobey his father, turns a blind eye to this situation and is cold towards his wife. Taking advantage of her need for nursing care, her father-in-law treats ``Hikaru'' like a toy and plays with his body. Her spirit is exhausted and she takes her aphrodisiac, deviates from her human path and becomes a ruined person.