Himoto Sora is a transfer student who possesses a strong sense of justice and dreams of becoming a knight. After arriving at Utopia Gakuen, she discovers a virtual reality-style game played by the male students, in which they use girls as weapons in battles for status and treat them as commodities. When she witnesses one of these girls being abused, she intervenes and, due to some sort of error, unwittingly becomes the first female participant in the game. Included one-shot: Volume 2: Shitsurakuen (pilot)