My 21-year-old college-student girlfriend, Yukine Nagasaki, has been dressing formally and going out often, supposedly for internships or job hunting. I am an unemployed part-timer who finally takes a new job at a women's erotic massage parlor—only to find my live-in girlfriend half naked as a regular trial client. A senior therapist massages her entire body, fondles her breasts, and fingers her while she moans more passionately than she ever does with me. Shocked yet erect, I wonder if this is NTR. When she notices me, the encounter turns into a threesome that gives her the strongest orgasms of her life, followed by a tense return home and eventual makeup sex. Yukine already has a job lined up and loves her boyfriend, but their sex life has grown stale. Secret visits to the service let her relieve stress through screaming orgasms. Her whole body is sensitive, she loves toys, and blindfolds, choking, teasing, and increasingly kinky play excite her far more than her boyfriend's mild sex.