A beautiful girl wanders the streets searching for her friends who are disappearing one after another... This is Ai. Exhausted and at a dead end in her search, Ai receives a call from one of her missing friends... Unaware that it's a trap, Ai summons her courage to rescue her friends and goes alone to the office of the Black Lion Society... She is forced to drink a drink laced with a powerful aphrodisiac by the men there and loses consciousness! When Ai wakes up, she finds herself held captive...