Higanjima – Saigo no 47 Hiai

The story of Higanjima continues with an island that is cut off from the rest of the world and surrounded by fish demons. The island is inhabited by warring vampires and humans. Ryousuke, his girlfriend Kazumi, and his friend Yamaoka are stranded on the island after being attacked by the fish demons. They quickly realize the vampires are cruel and inhuman. Ryousuke eventually joins the human resistance, but his main goal is to escape the island. However, even if they manage to leave, the vampires plan to spread their virus to the mainland, putting all of Japan in danger.