If you loved City Hunter the Movie: Angel Dust, try One Piece: Romance Dawn Story
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Theyboth carry the playful mood tag, and they sit in Action / Animation / Comedy territory. If that's the register that drew you to City Hunter the Movie: Angel Dust, the second film will land in a comparable space — through a different lens.
playful
What One Piece: Romance Dawn Story is
Here's an origin story no one asked for. Luffy, sent out for groceries, botches the task when he gets lost. A young girl named Silk then vows to defend her treasure from pirates. Serves its purpose, I suppose, for those keeping score at home.

