In a city inhabited by youkais and humans, Kotoha is an exception, becoming a half-youkai when she was struck by a mysterious lightning when she was a kid. But when she is struck once again, her powers go out of control and start threatening the city until her friends come to save her.

With the barrier destroyed and Hime unlocking her true powers, the gang drives the enemy to a corner and rescue Kohime after Morino reforms. However, the man reveals himself to be Enjin Hiizumi, a foe far more dangerous than they believed.