Eiji Otsuka is a social critic and novelist. He graduated from college with a degree in anthropology, women's folklore, human sacrifice, and postwar manga. In addition to his work with manga, he is a critic, essayist, and author of several successful nonfiction books on Japanese popular and otaku subcultures. He writes the manga series MPD-Psycho and The Kurosagi Corpse Delivery Service . One of his first animation script works was Maho no Rouge Lipstick , an adult lolicon OVA. Otsuka was the editor for the bishojo lolicon manga series Petit Apple Pie . In the eighties, Otsuka was editor in chief of Manga Burikko , a leading women's manga magazine where he pioneered research on otaku subcultures in modern Japan. He has also published a host of books and articles about the manga industry.

The author lives in Tokyo, Japan. Sho-u Tajima is a Japanese manga illustrator and video game designer known for MPD-Psycho, Madara, Robot, and many more.