A traveling girl known as Kuro searches the land for the witch that cast a curse on her, that stains her body black and will eventually kill her if not stopped.

Kuro travels with two young, shapeshifting twins named Sanju and Nijuku, as well as her teacher, friend and companion Sen, who must take the form of 1,000 bats.

The series started serialization in the Japanese Yonkoma magazine "Manga Time Kirara", published by Hōbunsha.

[5] In December, 2007 through a panel at New York Anime Festival, Yen Press announced it had licensed the series for release in North America.

[13] John Rose from the Fandom Post gave the third and fourth volumes a passing "A" grade, calling them a "phenomenal read" with "gorgeous art".

She says in her review that the "mixture of melancholy and humor" makes for a good read, and called it thought-provoking.