Satans champion across the multiverse

Kyosuke Kagayama. He died and is now the devil’s champion No harem ever. MC will be OP MC won’t be heroic I’m making this up as I go, so if things get weird...idk. There will be updates, but this is in correlation with my other two fanfics. I just started late so if he gets OP fast it’s because he’s usually my name and because his power needs to catch up to my other two protagonists.