Deep Insanity: The Lost Child
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Madness and unawakening sleep, Randolph syndrome. This new illness is slowly but steadily approaching humanity, caused by the huge underground world Asylum that appeared in Antarctica. There are strange creatures different from the earth, and unknown resources. People bet their lives on the depths of the mysterious new world to get huge wealth, organizational plots, or their own ambitions. And here alone, a young man with a wish in his heart is trying to challenge the front line of Asylum.
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Hiro Shimono, Ami Koshimizu, Kohsuke Toriumi, Yuya Hirose, Ruriko Noguchi, Kaede Hondo, Takako Tanaka
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Madness and unawakening sleep, Randolph syndrome. This new illness is slowly but steadily approaching humanity, caused by the huge underground world Asylum that appeared in Antarctica. There are strange creatures different from the earth, and unknown resources. People bet their lives on the depths of the mysterious new world to get huge wealth, organizational plots, or their own ambitions. And here alone, a young man with a wish in his heart is trying to challenge the front line of Asylum.
Cast
Hiro Shimono, Ami Koshimizu, Kohsuke Toriumi, Yuya Hirose, Ruriko Noguchi, Kaede Hondo, Takako Tanaka
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Deep Insanity: The Lost Child is streaming on Crunchyroll. Deep Insanity: The Lost Child is streaming on Crunchyroll Amazon Channel. Buy Deep Insanity: The Lost Child on Amazon Prime. Buy Deep Insanity: The Lost Child on Apple TV Store. Availability last verified February 24, 2026.
