Is ONE PIECE Gakuen!! completed?

As of now, ONE PIECE Gakuen!! is currently releasing.

When did ONE PIECE Gakuen!! start publishing?

ONE PIECE Gakuen!! started publishing on August 2, 2019.

ONE PIECE Gakuen!! is a manga, originally from Japan.

The manga is a comedy series featuring the characters of the Straw Hat Crew in an academic setting.

(Source: Anime News Network)

Demon Slayer: Kimetsu Academy

Attack on Titan: Junior High

One Piece Party

My Hero Academia Smash!!

Kimitachi wa Dou Ikiru ka

Chopperman