Sword God in DxD

A really bored boy and a loli dragon war god meet after the former gets hit by a truck sent by the latter. They later reincarnate in the world of High school DxD to start an War path that even Gods and Devils fear. This is my first story so ill get better as time goes. Cover not mine https://www.deviantart.com/shizuo-kusanagi/art/Sephiroth-3-119621256 Although i might do a harem but not in the traditional way the main character i made is someone doesn't feel/emotionless and only gets excited from battle so lets see how that plays out. Im going for a mix of serious and comedy. I think i know where it is right to use both of them