ONE PIECE FAN LETTER is a special anime that premiered in fall 2024, produced by Toei Animation.

About the production: the story comes from a light novel, there is 1 episode of about 25 minutes and its current status is "finished".

Its main genres are action, adventure and fantasy, with themes such as Female Protagonist, Pirates, War and Military.

On AniList, ONE PIECE FAN LETTER has an average score of 89%, one of the highest scores on the site, and appears on 60,262 users' lists.

The franchise continues in or follows from: ONE PIECE: Gyojin Tou-hen.

Two years after the Paramount War, the Straw Hats are about to reunite on the Sabaody Archipelago. At the same time, a girl who is head over heels for Nami is trying to hand a fan letter to her before the group leaves the island. (Source: Crunchyroll) Note: This work commemorates the 25th anniversary of the ONE PIECE anime through an animated adaptation of the "ONE PIECE novel Mugiwara Stories" light novel.

Official synopsis from AniList.