Ascension in dxd world

Haruka a young man who ended the long war died due to some accidents and he was happy to rest now but looks like fate didn't want that. note: i change some things in here and i am not that fluent in English so peace out and also my mc isn't your typical anti hero one he was more like a kind of naive yet efficient one and also he was cruel and cold blooded to his enemies depending on what they done to him or to others