As the BDSM fetish has gained social recognition, more men have developed a desire to tie women up. However, fulfilling this fantasy requires overcoming numerous obstacles. How many have actually realized this dream? Tanbi-kai serves as a space where such desires are fulfilled, exploring how S and M relationships are formed. Deep within the rope master's heart, intense emotions gradually crystallize into permanent imprints. The scent of the woman the first time he tied her up— that single moment remains vividly etched in his mind. A relationship where mutual breath alone brings satisfaction—perhaps this is the true essence of a BDSM bond. There's no need for flashy tools or performances; rather, it is through tying the ropes with one's own hands that genuine feelings emerge. The only tool used is hemp rope. Seen through the eyes of a connoisseur, this footage resembles the sensation of "voyeurism." Relationships cannot be seen, and emotions have no shape. Yet, through the medium of video, the purest feelings buried deep within come to light. The rope master's passion is answered by the bound woman (Chitose, Yuka) through her groin and her gaze.