Messengers of the Sky!

In order to save Rika, Endou's team heads for Heaven's Garden, where Tenkuu no Shito reside. They want Rika to marry the demon lord so they can seal away the latter. Endou and others won't allow that to happen, so they have a game to decide Rika's fate. But before the fearsome power of the angels, can they do anything at all? Will this be Rika's last moments?