Light Novel If you look back, there is a collection of Kittan (strange tales), a person who is guilty of the crime of Koizumi Yakumo / Riyo Hisaka Kodansha Taiga

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The youth and friendship of the beautiful monster collector Koizumi Yakumo (Patric Lafcadio Hearn) An unnatural death body that appears in a closed cathedral. Who is the most sinful? Is the truth a monster or a reality? Abandoned by his relatives, Orlando moved into an outlying seminary in despair. He met a mysterious boy, Pato Rick Hahn, who collected monsters. Koizumi Yakumo, who later became an active Japanese horror writer. A record of his vivid youth and friendship in the UK. Every day, a strange story in which an unnaturally growing child visits them, "Reverence without a name," "Heavenly Blue Butterfly," which revolves around a black cat that has disappeared and a blue butterfly that calls death, and one other piece.