Koharu, a rising idol in the unit StellaResta, finds her dreams and devotion to her manager shattered when she is coerced into a submission-based relationship with the manipulative Kurozuka Atsuya. Despite her guilt, Koharu becomes addicted to the pleasure and power Kurozuka wields over her, eventually leading her to a depraved underground world where she must balance her public image with her secret, tainted life.