It's not very similar. The school version probably has a lot of changes to fit the school setting, and the plot and characters might be quite different from the original.
One Piece Odyssey is indeed an original story. It builds on the familiar setting and characters but offers a distinct plot that sets it apart from the main manga or anime arcs.
The One Piece hentai mangas are unauthorized and inappropriate derivatives that deviate significantly from the original. The original manga is a legitimate and widely loved adventure story.
The 'One Piece DJ manga' might have some unique storylines or character interpretations that set it apart from the original. Maybe it has more comedic or alternate takes.
The overall theme of adventure could shift. With Sakura in the mix, there could be more focus on self - discovery and personal growth in a different way than in the original One Piece. Her journey of finding her place in this new world could lead to side - quests and storylines that deviate from the main One Piece plot, like exploring ancient ruins in the One Piece world that are related to her own past or powers.
'OC Adventure on the Grand Line' is also excellent. It dives deep into the lives of the original characters as they face the challenges of the Grand Line. The story is filled with intense battles and the development of the original characters' relationships with the established One Piece characters is really interesting.
One Piece's original novel had never been officially published, so there was no official version. However, some authors and editors may have already written novels related to One Piece, which are known as "original One Piece novels."
One of the more famous original One Piece novels was One Piece: The Nine-Man Treasure Plan. It told the story of a mysterious pirate king leading his pirate team on an adventure in search of the legendary nine-man treasure. This novel was also adapted into a manga and animation.
The One Piece hentai manga is not an official or legitimate version. It typically involves inappropriate and unauthorized content that strays far from the original story and its intended themes.