Reaper Of DXD

You've read Gamer stories. You've read overpowered SI stories, this is both. Prepare for Insanity and bullshit powerlevels. Gamer Oc, eventually OP Oc. Slight Au and refrences to other games that may or may not be known. Main characters will consist mostly of the Gamer, the Gremory group and Sitri group