The Human in DxD

After the fight for his existence, he borns with his memories in the DxD world, with his invincible determination and characteristic he will surpass everyone. The world is different, there are elements from Re Zero and other fictions, MC doesn't know the world is fictional but there is nothing that surprises him that much. Inspired by Reinhard so he will be a knight but also R-18 because he is a total human, there are %100 sex situations so I won't write romance to just write romance. Crosspost with Fanfiction.net for now.