One Piece Buff System OPBS

Haruki Haruno, a normal otaku, like everyone else that loves to read and watch animes and mangas dreams with a day that they will live inside their loved worlds...
Well, that happened with our Mc. He was sleeping and boom! He appeared in the One Piece world with a system. Cliche? Well... Yeah, but just wait to see his adventures in the One Piece World! Will he be the Pirate King? An Admiral? Or something else?
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Our Mc goes to One Piece World and became Luffy's third brother and with his abilities, he will realize his own dreams.

This story is slow. Until childhood ends, it will still slow.

[Editor: Aaronji.]

[Author: There are Edited chapters and not edited chapters. And... English is not my first language. If there is any error, tell me pls.]