Yongbi is a bounty hunter without fear or reproach. Especially without fear, actually. Despite his greed and his penchant for drinking (fortunately shared by his faithful horse) and women, Yongbi is still a charming young man. And when a boy carrying a medallion, source of much envy, finds himself under the protection of the adventurer, those who cross their path must prepare for the worst! (Source: Random Scanlations)

Gosu est un mot sino-coréen, d'origine chinoise qui signifie « maître », « expert ». Par exemple, « 바둑고수 » désigne un joueur de go de haut-niveau. Dans le dialecte de la province du Gyeongsang, ce mot désigne un chef.