Based on the game by Triangle Bitter.
The depths of our planet hide a subterranean, magical world named Roa currently in the grip of the terrible war relating to the all-female knight corps of Queen Gloria and also the monstrous troops of the evil syndicate Zerou.
The action starts when Metzer, a young and brilliant Zerou officer, gets official approvation from Zerou's high command to attempt a whole new plan suggested through the protagonist himself. Secretly relocated to the the top Earth, his mission consists in gaining the trust in the Sweet Knights, both japanese girls invested by Queen Gloria with the capability to protect the counter world from your monsters with the syndicate. Next, once discovered their weak spots, Metzer make use of his monsters to defeat, kidnap and brainwash the Sweet Knights into sex slaves focused on Zerou's cause.
Nevertheless the syndicate are not aware of (yet) of Metzer's great ambitions...
