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1. Promise and the hidden tail by BooChef0302

   Fandoms: One Piece (Anime & Manga)  

   • Not Rated
   • Creator Chose Not To Use Archive Warnings
   • M/M
   • Complete Work

   22 Jul 2025

   Tags

   • Creator Chose Not To Use Archive Warnings
   • Roronoa Zoro/Sanji
   • Roronoa Zoro
   • Sanji (One Piece)
   • Monkey D. Luffy
   • Nami (One Piece)
   • Nico Robin
   • Usopp (One Piece)
   • Tony Tony Chopper
   • Franky (One Piece)
   • Jinbei (One Piece)
   • Brook (One Piece)
   • Mugiwara Kaizoku | Strawhat Pirates
   • Secret Identity
   • Secret Relationship
   • Relationship Reveal
   • mermaid au
   • mermaid sanji
   • Hurt/Comfort
   • Soft Roronoa Zoro
   • Mugiwara no Ichimi | Straw Hat Pirates As Family
   • Protective Roronoa Zoro

   Summary

   Sanji is a mermaid. He and Zoro met when they were young. Old promises and hidden truths surface beneath the waves. As the Straw Hat crew sails deeper into the New World, Sanji's greatest secret threatens to unravel, but with Zoro by his side. How will the crew react when Sanji's secret are out

   Series

   • Part 19 of Relationship Reveal
   • Part 2 of Sanji's Identity Reveal

   Language:

   English

   Words:

   5,693

   Chapters:

   1/1

   Comments:

   8

   Kudos:

   426

   Bookmarks:

   47

   Hits:

   4,379