Kochira Katsushikaku Kameari Kouenmae Hashutsujo: Seton Tankentai! Sumidagawa no Chikai - Omoide no Shiroi Kujira wo Sagase!

"Kochira Katsushikaku Kameari Kouenmae Hashutsujo: Seton Tankentai! Sumidagawa no Chikai - Omoide no Shiroi Kujira wo Sagase!" comprises special episodes of the anime series. These episodes were broadcast after the main TV series concluded. The special was originally presented in two separate parts. However, some streaming platforms may offer the content as a single, consolidated episode, approximately 46 minutes in length. The episodes likely feature the familiar characters and setting of the original series, continuing their stories and adventures. The title suggests a quest or exploration, possibly involving the Sumida River and a "White Whale of Memories."