When Show Hamura ANGEL'S FEATHER's central protagonist is transferred to Yusei Gakuen School he bumps into his long lost younger brother Kai. However Kai suffers from amnesia and Show realizes that he has inherited his brother's memory. The supernatural occurrences at the school point to the existence of a magical world filled with intrigue and monsters. When their classmate Nagisa disappears the two brothers enlist the help of their friends Anri Chris Shion and Sena to track down the missing schoolboy.