One Piece: Romance Dawn Story

The Straw Hat Pirates, searching for the great passage "Grand Line", are in trouble when their food runs out! Luffy, searching for food on his own, finds a ship belonging to the pirate, Gary, and takes it over!! He lands at a nearby town...

Luffy was attacked by a young girl, Silk, who mistook him for a member of the other pirate gang. As the two eat a meal, they tell their stories. Meanwhile, Gary and his band are burning with anger at Luffy, demanding payment from the town's defenseless citizens...!!

(Source: jumpland.com/animetour/op/index_en.html)