Ten years prior to the manga's beginning, Kurohime brought an end to a massive war fought to own and rebuild the Tower of the Gods, which once completed would allow the builder to become a god themselves.
The being representing her rage, in a form of a small girl named 'Himeko', seeks to regain her body and powers, and attempt to take down the gods again; however the curse can only be undone with love, and Kurohime is predominantly selfish and manipulative.