Well, without more context about the specific 'hero of time story', it's difficult to be certain. But in some well - known fantasy tales, a hero of time could be a character with special powers related to time manipulation. They might be on a quest to prevent a great disaster that is foretold in time or to correct something that went wrong in the past. Link in the Legend of Zelda games is a prime example as he uses his time - traveling abilities to defeat Ganon and save Hyrule.
The Boku no Hero manga is finished. It reached its conclusion after a successful run, leaving fans with a complete narrative and memories of an exciting journey.