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.
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Yuko Sanpei
Butt Detective (voice)
Kumiko Watanabe
Kaitō Q (voice)
Takahiro Sakurai
Kaitō U (voice)
Rikiya Koyama
Star Mabushi (voice)
Katsuyuki Konishi
Mimitogari (voice)
Takehito Koyasu
Kaitō S (voice)
Ayaka Saito
Brown (voice)
Tetsuya Kakihara
Kaitō Z (voice)
Yasuhiro Mamiya
Buta Buhiro (voice)
Rumi Okubo
Berry (voice)
Hochu Otsuka
Kaitō G (voice)
Tomoyuki Shimura
Hikaru Karasuda (voice)
Kenji Sugimura
Kubifutoshi (voice)
Shinya Takahashi
Master Gōto (Voice)
Ikkei Watanabe
Chief Maltese (voice)
