Ryuuma no Gagou  

The Pseudonym of "Ryuma", リュウマのガゴウ

In a world where humans are hunted by "white skin" beings, there is a legendary figure named Ryuuma who gives hope to society. This person has been described in many ways but their legend has lived on for 50 years. The origin and creator of this legend remain unknown. Here begins the story of uncovering its secrets.