The Strongest Devil with a Gamer System: A high School DxD Story

Disclaimer: I do not own high school dxd, naruto, fairy tail, skyrim, or ms. koboyashi dragon maid. I only own my OCOur MC was once The Roman God of War Destruction, and Masculinity. The story main set universe is the high school dxd universe. Mars gets Reincarnated as Sirzechs older twin brother. this is my first writing. I am mostly a reader so.......yeah. if anyone wants to give me a pointer...