Driven by desire to seize her uncle's fortune, the woman Kazuha is drawn into the ultimate SM punishment, forced to endure relentless and brutal torture. Crushed by fear and humiliation, her deeply buried masochistic nature awakens. Dragged down, broken by threats, and defiled by filthy touches, she gradually transforms into something inhuman. In this process, she falls from mere womanhood into complete enslavement as a beast. The story is depicted in vivid detail, realistically portraying her emotional descent and delivering a powerful impact to the viewer.