<human>:  What is the origin story of the manga series, One Piece?
<bot>: One Piece is a manga series written and illustrated by Eiichiro Oda. It was first published in Shueisha's Weekly Shōnen Jump magazine in 1997. The story follows the adventures of Monkey D. Luffy, a boy whose body gained the properties of rubber after unintentionally eating a Devil Fruit. With his diverse crew of pirates, named the Straw Hat Pirates, Luffy explores the Grand Line in search of the world's ultimate treasure known as "One Piece" in order to become the next Pirate King. Along the way, Luffy battles several enemies, including old rivals, Marines, and other powerful pirates.