Psycho Diver: Soul Siren

Forgiven of her crime of looking into the past life of the one she loved, Yama Rikudou is a powerful being from the underworld sent to the human realm to hunt demons. She must eliminate the overflowing evil here in order to provide some balance to this world.

Legend has it that when you eat the flesh of a mermaid, you would live forever. Yuta and Mana are living proof of this... Together, they journey to various places trying to find meaning for their existence, or perhaps even a "cure" for their situation. One day, Yuta and Mana meet Masato, a little boy who seems terrified of his mother Misa. It seems to Yuta and Mana that mother and son have a very unusual relationship. What happens when Yuta and Mana decide to discover the dark secret Masato and Misa are hiding? And what about those monster-like creatures that have been appearing?

Animation of a very popular novel series by the writer WAKAGI Mio (若木未生), also adapted as a manga by MORI Makoto (杜 真琴), serialised in LaLa. The novels feature illusatrations by KOUGA Yun (高河 ゆん), and the character designs for the anime are based on these. The OVA is an original story that includes the early parts of the novels. Long ago... going back several centuries, there was a war between the Kuu no mono (空の者) and the You no mono (妖の者) that divided the heaven and earth. 900 years ago, the commander of the Kuu no mono, Kara-ou sealed in the commander of You no mono, Kuna-hi, sacrificing his own life to do so. And this present day, when You no mono has begun to be active again, Kara-ou is reborn as Shinobu Saiga. Coming back to earth, he has begun to make his move again to subdue the You no mono with his aide Kiba. Ryosuke Sakiya is a first year student attending Kouryo High School who has extraordinarily strong psychic powers. He was always hearing and seeing things ordinary people could not. He has a special aura around him and perhaps because of it, he ends up being targeted by the You no mono. One day, when he is on a date at the Tokyo Metropolitan Government Building, he is attacked by a strange power and is saved by the Jutsusha (術士 lit. "skilled ones") Jukyuro Satomi and Kisara Izumi. Jutsusha are people who have inherited supernatural powers of Kuu no mono to subdue You no mono who harm people. Ryosuke escapes without any injuries, but cannot resist becoming involved in the battles between these two forces.

Demons exist and their power is beyond what humans can fathom. In fact, they are so strong that humans do not stand a chance against them in a fight. The only thing strong enough to defeat a demon is another demon, and it is through this logic that Ryo Asuka hatches the plan to have his good-hearted friend, Akira Fudo, possessed by a demon. If a person is of pure of heart, then they might be able to control the demon that possesses them, and thereby acquire power equal to a demon. After raising some hell in a club, the plan works, and Akira is possessed by the powerful demon known as Amon. Now Akira is humanity's sole champion of justice against the hidden demon menace that has plagued humanity since the dawn of time.