Seraph of the end

"Ferid successfully coerces Shinoa Squad and Mika into joining him and Crowley on a field trip to Osaka. According to Ferid, the purpose of the trip is to see the truth behindthe Calamity that ended the world-ground zero of the apocalypse. But not all is as it seems, as vampire nobles from across the world are also converging on Osaka"--Back cover.