Oshiri Tantei: Saraba Itoshiki Oshiri yo

映画おしりたんてい さらば愛しき相棒よ

Oshiri Tantei's partner who disappeared 10 years ago suddenly reappears. He receives a mysterious message from Suisen and soon finds himself embroiled in a case of counterfeit art involving a massive plot to shake up the art galleries around the world. (Source: ANN)