Gatling Outlaw: The Dreamer of Destruction (English version)

A long time ago, the world was destroyed by a mad scientist, who realised that humanity had become a "brave new world" where already the dreamers and rebels of comfort had died in a dream full of lies and oppressive, now the world has become a hostile place, however, the world had not fallen completely, the cities that had survived the destruction of the world do their best to return the world to its original glory, but one man opposes it, his name is Gatling Outlaw.