The story revolves around the human student Sumi, who attends a magic school in the human realm. One day, a servant of the demon realm appears before him and informs him he has been appointed as a new servant of the demon queen. A romantic comedy between the demon queen and her servant ensues as a heart of charcoal catches fire from the flame of love. (Source: Anime News Network)

Yuuya's summer life is overturned by 4 girls, 2 of which possess special powers and small wings that occasionally appear on their wrists.

Leo and Zap visit the funeral of a woman on their way to a mission. A girl appears and asks, "So, which one of you is my dad?" That is the beginning of the battle for the "future" of this world. (Source: Shueisha, translated)

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)

It seems some killing machines have woken up, and want to destroy every sorcerer on the planet! But Orphen isn't allowed to die, so he must stop their evil plot. This is a side story to the first Orphen manga, but you don't have to know much about the Orphen universe, so go ahead, read on! (Source: Izumo No Ryuu)

A joint work between Kanzaka and Sorcerous Stabber Orphen creator Yoshinobu Akita. It was originally published in Dragon Magazine in March 2001, and was published in book form on June 30, 2005 accompanied by a radio drama.

Mahiru, the unidentified creature. Her favorite food is blood!! Her means of communication are punches and kicks!! This is a comedy about everyday life with the cute and cuddly Mahiru!! (Source: Akita Shoten, translated)