In a post-apocalyptic future humans live in peace with androids in a domed city. However, a strange series of murders has intruded into bored inspector Re-l Mayer's life.

Nenene, a famous female writer, hires the Paper Sisters, so named due to their ability to manipulate and control paper, as bodyguards.

In the Kanto region of Japan, seven high schools take place in a turf war for territorial supremacy: Nanyo Academy, Kyosho Academy, Seito Academy, Yoshu Academy, Rakuyo High School, Gogun High School, and Yoshu Private School. The fighters of each school bear the sacred jewels called magatama, which contains the essence of warriors from the Three Kingdoms era of Ancient China 1800 years ago, as well as their fates.