Chin Piece

Chin Piece (チンピース) is a comedic manga spinoff of One Piece, written and drawn by Yoshikazu Amami. The series started in the bi-monthly Saikyo Jump magazine's July issue on June 1, 2018.

Premise
Chin Piece revolves around a group of village kids led by Kusopp, who aspire to be great pirates like the Straw Hat Pirates. They then meet a boy named Chimpi, who resembles Luffy and whose penis can stretch like the pirate's.

Trivia

 * Chin Piece is also the name of a one-chapter parody written by Chinyūki ~Tarō to Yukai na Nakama-tachi~ author Man Gatarô and published in Shonen Jump 2017 Issue #42.