est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Strange events always unfold around genius boy Kai and mysterious girl Yuu. One day, Kai deciphers the ancient “Voynich Manuscript” and begins cultivating eerie plants. Attacked by a cat-shaped delivery man, Kai is kidnapped along with Yuu and the plant—but what happens next? A war of proliferating new lifeforms, planetary alignment within the school, unsettling prophetic dreams, the appearance of demons—will they confront these bizarre phenomena and difficult cases with brains and a carefree attitude?! A fantastical horror comedy where uniquely colorful characters run wild! (Source: Kadokawa, translated)
Source: AniList
External databases: AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections
Volumes
怪と幽COMICS First edition
1vols · 2025-10
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Saiyuu Youenden
西遊妖猿伝
1984 · 諸星大二郎 · 31vols
Shiori to Shimiko
栞と紙魚子
2001 · 諸星大二郎 · 22vols
HorrorMystery
Saiyuu Youenden: Daitouhen
西遊妖猿伝 大唐篇
諸星大二郎 · 10vols · Seinen
ActionAdventure
Mud Men
マッドメン
1985 · 諸星大二郎 · 7vols
Adventure
Shokai Shii
諸怪志異
1989 · 諸星大二郎 · 7vols · Seinen
DramaFantasy
Saiyuu Youenden: Saiiki Hen
西遊妖猿伝 西域篇
2009 · 諸星大二郎 · 6vols · Seinen
ActionAdventureDramaSupernatural
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Niwaka Reijou wa Outaishi Denka no Yatoware Konyakusha
にわか令嬢は王太子殿下の雇われ婚約者
2020 · アズマミドリ, 香月航 · 4vols
ComedyDramaFantasyRomance
The Wolf in the Flower Shop
花よりオオカミ
2020 · 75 · 1vols
Boys' LoveComedyRomanceSlice of Life
Oishii Coffee no Irekata
おいしいコーヒーのいれ方
2020 · 村山由佳, 結布, 青沼裕貴 · 12vols
ComedyDramaFull ColorRomanceSlice of Life
Anoko no Oppai kara dou ni mo Me ga Hanasenai Anthology Comic
あの子のおっぱいからどうにも目がはなせないアンソロジーコミック
2020 · 中村モリス [ほか] · 7vols
EcchiComedyRomance
Yancha Gal no Anjou-santachi: Kouichi-hen
やんちゃギャルの安城さんたち高1編
2020 · 加藤雄一, すおしろ · 6vols
ComedySchoolSchool Clubs
Night and Barrett: Chijou Saikyou Shujuu Nisshi
ナイト・アンド・バレット : 地上最強主従日誌
2020 · 三上敬 · 1vols
ComedyFantasy