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🔔 Notify me about new seasonsSynopsis
Professor Shiro Sakaki, a butterfly researcher, confesses to turning six young boys, including his own son Itaru, into "human specimens."
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Episodes
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- E1 Episode 1Next upDec 19, 2025 · 56 min
Synopsis
The bodies of young boys were found in six cases. Shiro Sakaki, a professor considered Japan's leading expert on butterflies, turns himself in. He has recorded everything in a report published on the Internet, from his motive to the process of his creation. The interrogation proceeds as if tracing his distorted record, leading to a sensational suspense story where beauty and madness intertwine.
Guest stars: Jun Murakami (Ichiro Sakaki), Aoba Kawai (Kozue Sakaki), Miwako Ichikawa (Sawako Ichinose), Hideaki Murata (Kimihiko Ichinose), Yoshinari Furuya (Police officer at the local station), Yua Shiraishi (Shiro Sakaki's student), Yurina Tsubaki, Eri Ota
- E2 Episode 2Dec 19, 2025 · 46 min
Synopsis
Shiro starts to express his artistic viewpoint during interrogation. The art camp is canceled when Rumi falls ill. Shiro goes to the mountain to take the boys home. In the warehouse, there are six cases on display. Shiro feels emotional upheaval due to his expectations toward Itaru. As the detective investigates further, a big mystery arises, and the interrogation gets to the crux of his story.
Guest stars: Jun Murakami (Ichiro Sakaki), Yurina Tsubaki, Yura Kimura (Shiro Sakaki (young)), Yasushi Fuchikami (Detective Narumi), Shunsuke Tanaka (Detective Katagiri), Mitsuyo Tsukada (Toru Shirase's grandmother), Kaori Takeshita (Mieko (Dai Kuroiwa's fan)), Hina Michikita (High school student)
- E3 Episode 3Dec 19, 2025 · 47 min
Synopsis
After creating five specimens, Shiro's final target is his beloved son, Itaru. Despite the memories with Itaru, Shiro only sees his son as a butterfly. Shiro makes up his mind to create his last specimen. At last, the report named "Human Specimen by Shiro Sakaki" seems to have ended. However, the letters in the report start to get distorted, and the story shifts to a new perspective.
Guest stars: Jun Murakami (Ichiro Sakaki), Aoba Kawai (Kozue Sakaki), Miwako Ichikawa (Sawako Ichinose), Hideaki Murata (Kimihiko Ichinose), Yura Kimura (Shiro Sakaki (young)), Renwa Sato (Rumi Ichinose (young)), Yasushi Fuchikami (Detective Narumi), Shunsuke Tanaka (Detective Katagiri)
- E4 Episode 4Dec 19, 2025 · 46 min
Synopsis
Itaru stays home while Shiro leaves for an observation survey of butterflies. Itaru stares at his father's specimens and invites his friends over. He starts recording his observations in his own report. When Shiro returns, they have dinner and share memories. Shiro opens his son's computer with a strange feeling about the specimens in his room.Three years later, Shiro receives a letter from Anna.
Guest stars: Jun Murakami (Ichiro Sakaki), Aoba Kawai (Kozue Sakaki), Yurina Tsubaki, Mitsuyo Tsukada (Toru Shirase's grandmother), Kaori Takeshita (Mieko (Dai Kuroiwa's fan)), Hina Michikita (High school student), Hinata Shimanuki (High school student), Kokoro Inuzuka
- E5 Episode 5Dec 19, 2025 · 63 min
Synopsis
Anna seemed proud, but she longed for a successor while looking at her mother, in the spotlight for her art book. After the art camp is canceled, Anna invites the boys to the mountain house. She insists she made the Human Specimen. Shiro understands Itaru's hopes to become his father's specimen. The truth of Itaru's death and the mystery of Anna's confession will be unraveled.
Guest stars: Yurina Tsubaki, Kinuo Yamada (Toru Shirase's mother), Daisuke Tani, Nao Okabe, Lemi Duncan, Shauna Kelly, Reza Emamiyeh, Go Fujita
Cast & crew
Hidetoshi Nishijima
Somegoro Ichikawa
Rie Miyazawa
Aoi Ito
Towa Araki
Jyutaro Yamanaka
Kodai Kurosaki
Leo Matsumoto
Ikuho AkiyaVideos
Trailers
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