I have already fought the final battle in the Valley of Gods, but the system is only activated?.

An inexplicable time traveler, who killed all the pirates with his natural holy body. Just after being surrounded by the top navy and pirates in the Valley of God, the system awakened! [The Road to Power 17: Face the Straw Hat Boy who will become the Pirate King in the future, be brave!] [Mission Details: Please defeat the [-]-year-old future Pirate King Monkey D. Luffy!] Looking at Garp, who is still in his prime with black hair, Allen only wants to ask one question. "Are you sick?"...