Four teenage girls are abducted, kidnapped, and tortured. Designated by numbers on their skin with a hot iron, young girls are ranked in the evening. The one that finishes last…

There is a “school” that abducts and confines girls to re-educate them as sex slaves. Kyoko, a bad schoolgirl, was caught by a witch and turned into student number 55….

It’s been a year since the “school” where captured schoolgirls were trained as sex slaves was destroyed. But a survivor, Arikawa, has planned to rebuild the school by using Chiaki,…

The day of human auction has come at a dreadful “school” that has been reopened. Among the “products” on the stage, there is Yuuki, with a given number 77, whose…