After causing a costly car accident, Seiji is forced into a secret sexual arrangement with Yukino, the wife of the car's owner, to settle his massive debt. However, the situation takes a dark turn when the owner, Tomioka, orchestrates a sinister plot to kidnap Seiji's partner, Ai, and her sister, Kokoro. Seiji is left devastated as he discovers the women have been coerced into a life of debauchery, becoming playthings for Tomioka and his associates.