Muzan Kibutsuji in DxD

Synopsis: a human reincarnates in the world of DXD with the body of muzan kibutsuji and his powers, 500 years before the main story. This is a concept that was in my head for a long time, but I never saw anyone writing about it, so I decided to stop waiting and write my own story. At first I admit it may be a bit bad to read, but from chapter 4 and visible my evolution in writing, I owe a lot to my early readers who were kind enough to advise me.