The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised.
Adapted from the novel C³One day the high school student Yachi Haruaki received a mysterious black box sent by his father from abroad. It was a "Cursed" object which could assume human form. The black box whose name was Fia came to Haruaki wanting to rid herself of the curse. Together with Haruaki and his boarder Konoha, Fia decides to do helpful things in order to neutralize the negative energy that was built within her, to be free from the curse that bound her.
