is a Japanese manga series written and illustrated by . It was serialized on Shueisha's Shà Ânen Jump+ manga service from June 2018 to January 2026. It is a spin-off of Eiichiro Oda's One Piece manga series. An original net animation adaptation was released in April 2025.
A group of high school students with the same names as the Straw Hat Pirates end up forming a One Piece fan club. Throughout the series, parodying moments from the One Piece manga.
Written and illustrated by Daiki Ihara, Koisuru One Piece began serialization on Shueisha's Shà Ânen Jump+ manga service on June 18, 2018. The series went on hiatus on November 7, 2021, due to Ihara launching Protect Me, Shugomaru! in Weekly Shà Ânen Jump later in the year. It resumed serialization on April 10, 2025, and ended on January 22, 2026. Its chapters have been compiled into twelve volumes as of January 2026.
An original net animation adaptation was announced during an AnimeJapan event on March 22, 2025. The series consisted of five anime shorts that aired on YouTube, Instagram and TikTok from April 1 to 5, 2025.