High School DxD: Defeating Demons

Arusbaal Belial, cousin of The Champion is... Dead? Wait, something isn't right here. If he's dead, what is he doing in Kuoh? He's a paraplegic, so why is running around on his two legs like there's nothing wrong? ... Cleria Belial? Who's that? OCxHarem, IsseixHarem. Will become more and more AU. Go easy on me, it's my first story!