This story is about a girl whose species generated powers from their soul that lives to fight and the girl in particular who survived to become the henchman in the name of chaos.

A story that branches off from the Four Knights of Catastrophe but like the name implies there's two knights, one being the "Mutt" or rather the hybrid of all the Seven Sins and the other being a Fairy with massive latent abilities and you will see them both grow in power, become wise and obtain friendship not just with each other but with the main cast of both stories. This worked on by 2 people so if some parts seem different than others that is why as well, also remember this is a continuation.