32-year-old Minami Uemura, married for three years, finds herself sexually unfulfilled as her intimate encounters with her husband occur only once every two to three months. Desiring release, she decides to embark on her first SM experience. Amid tight bondage, naked exposure, and torment from sex toys, her shame and pleasure intensify. Even as she endures humiliation with a nose hook, she receives a facial with deep-throat pig-style ejaculation, sinking into overwhelming pleasure. Bound to a restraint chair in a wide M-shaped spread, immobilized and helpless, she writhes in ecstasy from intense vibrator stimulation. Screaming under the assault of a powerful electric vibrator, she withstands flogging from a suspended whip while being choked, climaxing so intensely her consciousness fades away.