From Image comics :

Adrian Velba has trained all year to fight in the Valley of the Kings’ legendary tournament. However, despite his ambition, he has no chance of winning. Not only is his partner unable to compete, but at 12-years-old, Adrian is the longest of longshots. That is, until a mysterious, powerful stranger enters town and offers to join forces with Adrian. But who is Richard Aldana? And why, in a world of magic, does he rely solely on his fists? Eschewing magic and using only his martial arts prowess, Aldana’s motives are as mysterious as his origins.

Lastman is depicted as a "French-style manga", by Bastien Vivès: "We use the format and some codes of the manga but we're not playing at imitating Japanese culture".

In 2016 the manga receives a French anime series under the same name that set before the original story.

Note : The series won the prize of the "Best non-japanese manga" at the Japan Expo 2019.

Original Comic

Official Translations:
English