鬼蜘蛛ト狐ノ獅子ト (Onigumo to Kitsune no Shishi to)

Background
"Onigumo to Kitsune no Shishi to" is a part of the Onibi series. It's arguably the first of or second in the series. There is no official or exact story, but a popular interpretation is that The Spiders (Gumi's family) have been captured by the Kitsune Foxes (Miku's family).So Gumi kills tortures Miku, rapes her dead body and eats her due to madness of being tortured by the Kitsune Foxes. But since Miku is a Kitsune, she lays a curse on Gumi; she and her children,descendants,etc. must continue to be cannibals and praise Miku or she'll kill them.