A cross-media project brought to you by Minoru Kawakami! An origin novel that unravels the comic! This is a world dominated by the "Black Witch." Humanity once succeeded in sealing away a witch who sought to destroy this world on the moon, but her power still leaves scars on this world. On the night of the Hexennacht, which occurs once every ten years, who will judge the witch sealed on the moon? The girls compete for that position, clashing at high speeds fueled by their hearts. Shells tear through the earth. To save the world!! The comic serialized in "Monthly Comic Dengeki Daioh" is being adapted into a long novel by the original author himself! A new magical girl story brought to you by Minoru Kawakami, the creator of "Kyoukaisenjou no Horizon"!