Oshiri Tantei: STAR AND MOON is an anime film that premiered in winter 2025, produced by Toei Animation.

About the production: the story comes from a other, the film runs about 76 minutes and its current status is "finished".

Its main genres are comedy and mystery, with themes such as Detective and Kids.

Story begins when Koala asks Butt Detective to find a missing relative who disappeared from an idol contest. The case takes Butt Detective to Stardust Island, the site of the contest, and also the home of the international criminal organization Phantom Thief Academy, headed by Phantom Thief G. Here, the organization advances its secret conspiracy, codenamed the Dark Age Plan. Butt Detective enters Stardust Island under the guise of an idol. At the same time, he joins forces with Phantom Thief U, who is out to steal back the valuable Moonlight Stone from Phantom Thief G. The story will also reveal more about Brown's past. (Source: Anime News Network, edited)

Official synopsis from AniList.