Sora Minami plays Takagi Moka, a high school girl who leads a secret life as Fontaine, a beautiful masked heroine. She battles Dark Knights, a gang of villains terrorizing the city. One day, while investigating a series of mysterious disappearances of beautiful women, she confronts a monster at the crime scene but is ultimately captured by the Dark Knights. Her body is then auctioned off as merchandise at the "Honey Hunting Club," an underground operation run by the Dark Knights. Before the auction begins, she is stripped bare and publicly humiliated, subjected to degrading acts by the organization's leaders and corrupt politicians. Despite her courage, the relentless assault breaks her will, driving her into an orgasmic hell from which there is no return—consumed by pleasure, she falls into depravity. [BAD END]