Prestigious all-girls school called Saint Orkis Academy was founded by the wealthy Azuma family. Although it was recently made co-educational, it still maintains its reputation as a top school. The academy is currently led by the daughter of the Azuma family's head. However, a new threat emerges in the form of the Nishiki family, a rising conglomerate that secretly trains and sells sex slaves to gain power and influence in the political and economic spheres. The Nishiki family sends a young and skilled female trainer named Kuga Kei to infiltrate the academy and take down the Azuma family. The Azuma family, unaware of his true identity, accepts him as a transfer student into the academy.