Because Kizaru belongs to the revolutionary army and Luffy's father is the leader of the revolutionary army, Kizaru is called Young Master Luffy.

Although Kizaru is already one of the admirals of the navy, he has been secretly protecting Luffy out of his attachment to the revolutionary army. Kizaru has twice rescued Luffy in time. The Tianlong people were defeated on the Earth Islands, and Kizaru still took the initiative. If Kizaru refused to come forward, Luffy might have died long ago.

The second time Kizaru rushed to save Luffy. He rescued Luffy in Akainu's territory and handed Luffy to Whitebeard. It seemed that Luffy was saved both times. The injury was serious, which showed that Kizaru had always indirectly protected Luffy.

"One Piece" plot:

Gol D. Roger, a man who has wealth, fame, power, everything in the world, said something before his execution The words made people all over the world rush to the sea. "Do you want my treasure? If you want it, go find it on the sea. I'll put it all there."

In order to find the legendary secret treasure "ONE" left by Roger PIECE”, countless people raised their flags and fought with each other.

There is a boy named Luffy. He accidentally ate a "Devil Fruit" and became a rubber man. While gaining superhuman abilities, he paid the price of being unable to swim for his whole life. Ten years later, Luffy went to sea to fulfill his agreement with Shanks, who lost his arm to save him. He continued to find like-minded partners during the journey and began his adventure.