The Lost Child
Heavenly and demonic forces battle in a war for our world beyond our perception, and you've just become its newest combatant.

Occult journalist Hayato Ibuki encounters a strange girl during his investigations into a series of mysterious suicides in Tokyo. She implores that Hayato must live, before bestowing upon him a mystical device that allows him to capture celestial and arcane creatures. He is now thrust into a world beyond our own, home to horrific monsters and celestial beings known as Astrals. In it, he must delve into dungeons called Layers and solve the mystery of the device. Where his journey leads him could decide the fate of our world...

Hayato Ibuki, a tabloid writer, was investigating the mysterious suicides that were taking place in Shinjuku station. During his investigations, a mysterious shadow pushes Hayato onto the tracks. A beautiful, mysterious woman, Balucia, saves Hayato at the last moment and gives him a large case... And thus, Hayato's new life begins.

Inside the case is a demon gun, Gangaur, which is a tool that can capture and use demons. Hayato uses its power to turn demons into allies.

With the Gangaur in hand, and accompanied by the self-proclaimed angel, Lua, the supposed chosen one, Hayato, travels all over the country to investigate mysteries and search for that beautiful mystery woman. And while he's at it, he gets caught between the ambitions of the dark rulers and the expectations of the angels...