The Gift of God - Book one: Birth of Daybreak

Issei Hyoudu, the Hand of God, is set up to take over heaven. Michael, however, will not go so willingly. When during one of his quests he crosses paths with the peerage of Rias Gremory, the Princess of Destruction from Kuoh Academy, a seemingly insignificant trade changes all the rules of the game. (full summary inside. IsseixHarem). First lemon now up.