"Sensei. I'm in your hands today." "Let me confirm one more time. You have your wife's consent, correct?" "...Yes." "I see. Then let's begin..." Under her husband's instructions, Yumi was to be bound by the rope master, Sagawa. "Yumi, do you feel it? Does it excite you?" "I... if you wish it... if it excites you..." Various humiliations inflicted upon the wife unfold right before her husband's eyes... a husband who can do nothing but watch... In this way, the strength of the bond of love between the two is put to the test...