Raimon Ryuuta and Kuuko are sibling. Their parent is a treasure hunter, so since they were little they lives in a shrine with their parent's best friend who is an old man. Ryuuta and Kuuko are interested in anything strange, curious issues. Together they set up their business as a Fushigi Hunter, to solve cases of strange paranormal activity people asking them for help.

Shinji Hiramatsu's manga adaptation of Yukihiro Iizuka's award-winning work "Monster Hunter"