[One Piece + power fantasy + dramatic twists and turns + hot-blooded + joining the crew + charity brings huge rewards + memes + tearjerker moments, if done well]
Su Hang transmigrates into the world of One Piece and awakens a Charity System. He can earn rewards simply by doing good deeds.
The day he awakens the System, the entire sea’s atmosphere changes!
Sengoku: “This pirate Su Hang has done every good deed there is! He doesn’t act like a pirate at all!”
Garp: “Why does everything Su Hang does, despite him being a pirate, make the Marines look bad?”
He punches Morgan, kicks Kuro, and roasts Arlong with lightning.
After entering the Grand Line...
He goes to Drum Island and builds a public hospital.
He goes to Alabasta...
Crocodile: “I’m the most popular person in Alabasta.”
So Su Hang builds irrigation works across Alabasta and becomes a beloved national hero. “Nobody understands charity better than I do.”
The Paramount War...
Su Hang: “Ace can’t be killed. I’ve said my piece. Who’s with me? Who’s against me?”
① I suggest making each chapter a bit longer, perhaps combining two chapters into one. ② I suggest adding more of your own elements. A well-written story with a main character can be a gem, but a poorly written one will be unappealing. (Personally, I don't like stories with main characters and would likely drop them; this is purely my personal opinion.)