These adventurers are sheyenne rainstorm, a gunslinger who holds the legendary weapon called arms; kiel aromax, a scientist who looks like he should be carrying a sword; roleta oratorio the crest sorceress, a magic-user who uses cards called crests to cast spells; and mirabelle graceland, one of the noble red, which are a family of vampiric creatures who live alongside human beings they also travel with cute little intelligent furry things, from the popepi pipepo tribe, named isaac and jerusha. This anime is based on a playstation game under the same title.