Deep insanity nirvana

紹介(英語)

One day, an asylum in a large hole is discovered in Antarctica. At the same time, the mysterious coma-inducing illness Randolph's Syndrome begins spreading around the world. Many countries sent an investigation squad to the asylum, believing it to be the cause of the disease, but not a single person safely returned. Sergiu Sol, a boy with a special resistance to the disease, and Antarctica's jack-of-all-trades Hildegard Olympiada Yamada, decide to take on the challenge of the large hole without a map, but...!? What is the cause of the coma-inducing disease? What in the world is the asylum? Go down to the deep, jet-black bottom, one with insanity. (Source: Anime News Network)

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単行本(3冊)

• Deep insanity nirvana 4(2022)ISBN 9784757578456
• Deep insanity nirvana 6(2023)ISBN 9784757585874
• Deep insanity nirvana 5(2023)ISBN 9784757585867