Nightingale and Sparrow
Status
Summary
The Straw Hats land on a kind and quiet island, an unusually kind and quiet island. There they meet Anya and Zita, two girls who help the pirates, saying that they owe Luffy? These two girls also have their own mysterious past. Pretty much a story of Anya and Zita with the Strawhats. (The summary isn't too great but I think the story is better.)