Shihaisha no Tasogare

After her fiancé transforms into a violent creature, Shizuka seeks help from private detective Tsunami Shijo. Behind his human appearance, Tsunami is an ancient guardian whose purpose is to stand between humanity and the demons that prey upon it.

The search draws them into the hidden conflicts of Neo-Shinjuku, where supernatural powers survive beneath a modern city’s surface. Shizuka’s personal tragedy becomes part of a much older struggle, and Tsunami must confront forces that threaten more than a single life.