is a Japanese children's novel series written by Hiroshi Ishizaki and illustrated by Kaori Fujita.

The series was launched on Kodansha's Aoi Tori Bunko imprint between July 2005 and February 2012, releasing 15 volumes during its run.

As such, Gyubid decides to train Chiyoko to become a black witch herself, learning various magic spells whilst facing off against various occult mysteries.

The original novel series written by Hiroshi Ishizaki and illustrated by Kaori Fujita was released on Kodansha's Aoi Tori Denki imprint between July 2004 and February 2012.

Released over 15 volumes, the series has managed to sell over 2.6 million copies.