**Synopsis:**  
After the Fourth Great Ninja War, Naruto Uzumaki sacrifices himself to seal a cosmic entity threatening all existence. But instead of oblivion, he awakens in an endless cycle of reincarnation across countless worlds — each one more dangerous than the last. From sailing the Grand Line with Luffy, exorcising curses with Gojo, battling Titans beside Eren, to fighting wizards and superheroes, Naruto must adapt, evolve, and uncover why a mysterious **System** is guiding him through these realities.  

Every world grants him new powers, enemies, and allies — but as he learns more, one truth becomes clear: all universes are bound by a single, hidden force, and Naruto may be the key to saving them all.  

**Concept Hooks:**  
- Naruto gains “World Points” from completing quests given by the Multiverse System.  
- Each world resets his body but retains memories and partial chakra.  
- A mysterious entity, calling itself “The Observer,” manipulates events across worlds.  
- Final arc culminates in Naruto fighting a threat that fuses all realities into one.

- Kurama (Nine-Tails, residual spirit/advisor) 


- The Observer (original antagonist/guide; multiverse entity) 


- Multiverse System (sentient interface; quests/rewards) 


Character Names