I'd recommend 'The Return of the Invincible Hero'. It features a hero's return and has comparable action and adventure scenes like in 'The Hero Returns'. The character development and plot progression are also somewhat similar.
You could try 'The Legendary Hero Reborn'. It shares the idea of a hero returning to face new challenges and foes. The storylines have some common elements with 'The Hero Returns'.
One manhwa that might be similar is 'The Supreme Warrior'. It has a similar theme of a powerful protagonist making a comeback.
In 'The Hero Returns' manhwa, the plot centers on a hero who returns to a changed world and has to overcome various obstacles to restore justice. There are exciting battles, complex character relationships, and a lot of plot twists.
The story has unique plot twists and well-developed characters. The art style is also very appealing.
One manga similar could be 'One-Punch Man'. It has a similar theme of a powerful protagonist and exciting action sequences.
It's about a hero who reaches the maximum level and then makes a comeback with new adventures and challenges.
The story might take an exciting turn as the hero faces new challenges or reunites with old allies.
I think 'The Gamer' could be similar. It has elements of adventure and character development like in Hero Manager.
I'd recommend 'Lookism'. It has a similar theme of underdogs fighting against odds and has engaging character development.
You might like 'Solo Leveling'. It shares elements like adventure and unexpected plot twists like Rental Hero. The characters' growth and challenges are quite captivating in both.
Maybe 'Tower of God' is a good choice. Both have complex storylines and diverse characters.
One manhwa that could be similar is 'The Breaker'. It shares elements of action and adventure like Kill the Hero.