This is a Fate/EXTRA + Highschool DxD Crossover. Published in FanFiction.net under the name of Caelus Lucis Caelum. The Body of Hakuno Kishinami was surprised to find himself in another world and that astonishing fact escalated when he wasn't the only one transported into this different reality. Will he brave the challenges that this world might bring to him? He certainly hopes so.