Dragon God of Nightmares

this is a story of Pure Evil Issei being born from the betrayals and etc.
Also, this story might be the one that I might continue a lot or probably give up, idk, I am not like the other fanfic writes. I am slow to create at least two chapters a month.
I don't own high school DxD or anything
(High School DxD × Hardcore Leveling Warrior × One Punch Man × Ragma crimson)