Kusaka Yuu is an average high school student who lives an average life with the weight of the death of a childhood friend always on his mind. Little does he know, there is a war going on where creatures, called Ayakashi, and their users fight among each other, that is until he meets Yoake Eimu.. Bearing a striking resemblance to Kusaka's childhood friend, Eimu is an Ayakashi user and her chance meeting with Kusaka, will change his life as he knows it forever. Ayakashi is a parasite life force that gives superpowers to its host, taking in return the host's entire life force. Yu Kusaka is a student that lost his will to live after the death of a dear childhood friend, until the day a mysterious girl, named Eimu Yoake, appears. From that moment on, his life would never be the same again. Hunted by Ayakashi and their hosts, the power within Yu awakens and a never ending battle begins.
Last episode: Symbiosis
