The creation of Fools Rules

Fools Rules is my own current manga project that I'm working with. It's supposed to be published online whenever it's ready. So far I've created the two main characters, Yuu and Emiko. They are brother and sister, who used to be living a normal life. But when their whole family, including themselves died in a accident - they where reborn as demons. Now Yuu and Emiko wants revenge and therefor they're going to destroy the world. And then their adventure starts.