This video was compiled from footage shot over a year at the request of SM magazine editorial department. It features Keiko, a slave girl sworn to live her life as a sex toy, undergoing training by Mr. Tsukushi—her master for more than ten years since she was a college student. Despite her delicate, youthful appearance, Keiko is a true masochist who has devoted herself entirely to serving his desires. Currently working full time as a caregiver, she spends most of her free time in a customized animal cage honing her skills as a perfect sex slave. Enjoy this rare glimpse into one year of a real masochist's journey. [Note]: This production consists of amateur SM enthusiasts recording their own play sessions. Expect raw, explicit visuals without any acting or storylines typically found in AV productions.