Breathing techniques are a Demon Slayers' secret weapon in their fight against Demons. But what if Demons could use them too?

He ran into a bloodthirsty demon, as a result of this ... with someone as cowardly as Zenitsu. Kaigaku later committed an ...

Kaigaku is a narcissist with a superiority complex that comes out at every turn. His sense of morals is so twisted that he sees no wrong in his actions. He is also one of the few demons in Demon ...