One Piece: Oounabara ni Hirake! Dekkai Dekkai Chichi no Yume!  

One Piece Special: Open Upon the Great Sea! A Fathers Huge, HUGE Dream!, ワンピース 大海原にひらけ! でっかいでっカイ父の夢!, One Piece: Open Upon the Great Sea! A Father's Huge, One Piece Special: Open Upon the Great Sea! A Father's Huge, One Piece Special: Open Upon the Great Sea! A Father's Huge, HUGE Dream!

The narrative begins with Pirate Zaps ship, where Bonnie and Max are exhausted and yearning to flee. However, they lack the financial resources to do so. Meanwhile, three kids on board overhear their conversation and learn that Amanda, the eldest among them, knows about a valuable treasure hidden somewhere. She proposes a deal: if they help her escape and obtain the treasure, she will let them take as much of it as they desire. The crew agrees, and they barely manage to evade danger and reach a small island where they encounter Luffy and his group. Unfortunately, their pursuers track them down and capture Amanda and Luffy, bringing them back to their boss, the leader of the Bayan Pirates, who is also after the treasure. Now, Luffy and his companions must fight against the Bayan pirates to recover the treasure that Amanda's father had left for her children. Through this experience, Amanda comes to understand and appreciate her father's love for adventure and treasure hunting.