Say, did you think that humans were the one standing at the top of the food chain? That's a great misunderstanding. The ones who are located at the top of hierarchy of this world are "Them" who live inside the darkness. By no means do they come to the surface world, the one we humans live. What we understand about "Them" is only that they absolutely hate having their existence to become known to human society. While there are some of "Them" with a form resembling that of a human being, there are others that look like a completely different kind of living creature. It is rare, but sometimes trouble between humans and "Them" can happen. Humans who discover the secret of "Their" existence, a stray "Them" preying on humans, and many other problems that I can not talk about to anyone. In those cases, in order to resolve those incidents involving "them", an utility man is employed. That man's name is "Pluto O"... that's me. What I told to you only was what I know. If you ever get in troubles, call my name three times. Say "Pluto O! Pluto O! Pluto O!", and if you're lucky I'll show up to help. All the volumes of this series were released under the name of Echizen Matarou (越前魔太郎); the true identities of the writers were later revealed on Kodansha's page, but not which author wrote which book. The project was a collaboration between Kodansha and Kadokawa, and the books were published by 3 different labels. (Source: Kodansha Book Club)

Anthology of doujinshi from different artists. **Vol 1** - Cover illustrator: SHINSAIBASHI Paruko - Doujin artists: KAKIUCHI Rei, HANABUSA Yukiko, OGINO Jun, IZUMISAWA Haruka, HARRY Yoshino + ODA Kanan, KINUYAMA Sameharu, KAGEMURO Yuuki, Ookura, Oolong, 白竹理仁, TATEWAKI Mame, SAWAKI Yuo, AMAMOTO Haru, HIBIKI Akiko, SASUGA Newo, Nairo, SOU Irime, Moriko, Atsuyo, YUKIYOSHI Komina, UZUKI Jun, 夜鳴屋紅子, AKATSUKI Kuuko - Stories included: • *[Tatoeba, Sore wa Heibun Hibi](https://www.mangaupdates.com/series.html?id=156117)* by AMAMOTO Haru: (Yamazaki x Shinpachi) • [color=blue]*Chiisana Marui Koujitsu*[/color] by AKATSUKI Kuuko: (Okita x Kagura) Kagura sees Okita talking to a shopkeeper and gets the wrong idea. **Vol 2** - Cover illustrator: OKI Ginjou - Doujin artists: SOU Irime, TAKENAKA Chikako, 夜鳴屋紅子, ASHIDA Maki, Nairo, ICHIJOU Karune, YAMADA Fumi, NANAMI Noriko, TATEWAKI Mame, ATSUKI Ryokka, OGINO Jun, SAWAKI Yuo, AKATSUKI Kana, IZUMISAWA Haruka, ICHINOMIYA Shihan, Atsuyo - Stories included: • [color=blue]*Chotto Dake Odoroita Kara*[/color] by ASHIDA Maki: (Okita x Kagura) Okita plays with Sadaharu. • [color=blue]*Zurako Funtouki*[/color] by TATEWAKI Mame: (Hijikata x Katsura) Preparing to open the Okama bar he works at Katsura accidently splashes water on a certain Shinsengumi walking past... • [color=blue]*Bochi Bochi*[/color] by ATSUKI Ryokka: Hasegawa helps Kagura see that she's not alone... **Vol 3** Doujin artists: YUKIYOSHI Komina, HINA Youko, KAKIUCHI Rei, HIBIKI Akiko, Nanao, Ookura, Nakai peach!, Moriko, MIZUKI Sari, 白竹理仁, WATANABE Kisaburo, HANABUSA Yukiko, カガミ, SATOU Mutsu, NANASE Kameko, AKATSUKI Kuuko, FUJII Ryou **Vol 4** Doujin artists: WATANABE Kisaburo, KANNO Kazuki, Kisayuki, Kaina, ECHIZENYA Taichi, MIZUKI Sari, KAGARI Nakiwo, MIKAGE Tsubaki, BANRI Atom, KAJI Hayato, INOUE Nawo **Vol 5** - Cover illustrator: TATEWAKI Mame - Doujin artists: NIRESUMI Okina, Tamori, KUJOU Yako, Omatsu, Inago, HIBIKI Rina, HINA Youko, KANNO Kazuki, TAKA Peko, KATASHINA Miyura, KAJI Hayato, Nanao - Stories included: • *[Summer Steal Head](https://www.mangaupdates.com/series.html?id=33869)* by KAJI Hayato: (Okita/Gintoki, hints of OkiKagu) Note: [color=blue]blue[/color] = scanlated