A true masochist, Kazumi exists solely to be abused and degraded, finding pleasure only in suffering. This documentary meticulously records, over the course of a year, her submission to sadists and dominatrices as per her master's orders. Part 4 features three key episodes: "filming natural defecation," "double penetration pleasure hell," and "bookstore oral service," revealing profound shifts in her mental state and emotional depth. This work delves deeply into the essence of her masochism, delivering a powerful and disturbing experience for the viewer.