Nanami, a married woman suffering from chronic body pain, begins visiting a chiropractic clinic. During her treatments, she experiences behavior from the therapist that borders on sexual harassment, but as her muscle tension dramatically improves, she finds herself returning for more sessions. With each visit, the therapist's advances grow bolder and more suggestive, gradually heightening her sensitivity until her private areas begin to burn with arousal. One day, as the therapist prepares to leave, he catches her touching her swollen clit in desperation. Told "It's fine, please continue," Nanami surrenders completely. Her body, now beyond control, is stimulated by the therapist's fingers, sending her into violent, shrimp-like convulsions with the first creampie. The once demure wife transforms into a desperate woman, her pussy pounded relentlessly until she is driven to an overwhelming, mind-blowing orgasm.