I am not a hero, nor a villain

AU. I was once a weak, anime loving guy. Now, I'm the twin brother of Issei Hyoudou, a Devil in Rias Gremorys Peerage and the wielder of the Boosted Gear. What do I do now that I'm in the DxD world? Only what every straight guy would do. Become as strong as possible and gather a harem of the most beautiful babes all the while fucking with cannon. Smart/Strong OC/SIxMass Harem.