ガン ブレイズ ウエスト (건 블레이즈 웨스트)

In the Old West only the strong survive. Viu Bannes is a boy on a mission to be the best gunfighter in the West. When Viu meets a vagabond gunslinger named Marcus Homer, his desire to be the best becomes even stronger. He knows it's his destiny to travel to the legendary land known as Gun Blaze West--where only the toughest gunmen dare set foot!

(Source: VIZ Media)