At a spa recommended by her husband, Rika falls into a trap of forbidden pleasure. What begins as relaxation becomes escalating sexual treatment as a therapist’s tricks and aphrodisiacs erode her restraint. Though guilty about betraying her kind husband, she keeps returning and grows dependent on increasingly extreme sessions. She is trained into an intensely sensitive body that convulses, urinates from overwhelming climax, and squirts repeatedly with a vacant orgasm face. When her husband finally witnesses how completely pleasure has conquered her, their peaceful marriage begins to collapse.