One Piece: I'll copy Luffy at Marineford and save Ace!

"A story of following the ship, slice-of-life scenes, adventures with the main characters, and comedy. Thanks for your support."
Su Mu unexpectedly enters the world of One Piece! Coincidentally arriving at Marineford during the war, he awakens the God Hand, which allows him to copy and enhance the abilities of anyone he touches!
And so, a commotion arose at the top...
Akainu: "Where did this kid come from? How come his abilities are the same as mine?"
Garp: "His Armament Haki is actually stronger than mine!"
Hawkeye: "You should be the world's greatest swordsman..."
Blackbeard: "How many Devil Fruits did you eat???"
Finally, Luffy grinned at Su Mu, revealing two rows of teeth.
Luffy: "Bowl cutter, I've decided you're my crewmate!"