A short story featuring the "Anything-Solving Club," comprised of characters from the "Butt Detective" series: Brown, Koala-chan, Sarubatooru, and Kamenokouji Midori. The group confronts the villain U, who targets an art museum and a painting competition for his misdeeds. Directed by Emi Tezuka, with voice cast including Ayaka Saito as Brown, Satomi Kobayashi as Koala-chan, and Takahiro Sakurai as Villain U, bringing together the anime's staff and voice actors. Screened simultaneously with "Butt Detective the Movie: Farewell, My Beloved Partner (Butt)."