Episode 5
Usopp uses a "Buku Buku no Mi" device to send Nami, Tsuchi, and Toriko into the One Piece manga.
Aired 05/04/2025EP 5 - Episode 5

2025
Koisuru ONE PIECE
The premise of this spinoff is about three high school students: a young male student, his girlfriend and a third wheel who is a One Piece fanatic. Their names are similar to the Straw Hat Pirates and the group form a fan club dedicated to One Piece.
(Source: One Piece Wiki)