For eight years, we have been private partners in bondage, both in public and private. Kasumi Horai, a female bondage artist, was fascinated by the world of bondage and was roped for the first time. Since her AV debut in "The Bondage House of Harmony and Elegance Vol. 5," Hoshino Yuko has grown from a beautiful young woman into a voluptuous woman. This documentary chronicles the bond between us, marking the eighth anniversary of our private bondage relationship.