If you liked the Tough manga, the Anime-Planet community thinks you'd like:
Though Holyland and Tough differ between light and dark, the principle remains the same. Our main protagonist, who is a young man, strives to make it into the world through martial arts. They dedicate everything towards strengthening themselves to win. Both protagonists have the same ideas and only want to move up in the world. They live by fighting. Though their backgrounds may differ, each guy has had a tragedy within his youth. As the story progresses, the fights to achieve their Holyland, or sheer strength, become harder. Give Holyland or Tough a try as the main characters struggle to become something in the world.