Radiant 2nd Season

Kingdom is being ravaged. Protagonist is connected to both sides of conflict. He isnt all powerful there are troubles among the way. You never know what sort of plot twists story might bring... 

Both have cluelessly optimistic protagonist who have farfetched dreams. Somewhat similar silliness to their antics 

Both are second seasons to action fantasy anime that improve upon their predecesors by looking for a darker tone with more character depth. 

- Main character is trying to prove himself - Ends up making lots of friends - Struggle with their power - Lots of similarites within the anime 

One Piece and Radiant have the same concept, having a dream to become the strongest and finding something. Both main character have a special power they have yet to master and rise up through their journey. Both anime also deal with serious topics such as discrimination.  

Like Seth in Radiant, Gon in HxH has a goal in his life that he's capable of everything to achieve it. You'll get through all the character developpement of a weak Gon to a grow up and powerful character ! Very amazing to watch and you'll recognize similitudes in those 2 anime ! 

Both about teenage kids who have a source of superpower inside them