There is a misconception that this series was based on a Manga by Toshio Maeda. In reality, this show was created as an anime-solo series, meaning that a manga version does not exist. Toshio Maeda served as an executive producer for this OVA series, and helped create the characters, setting, and overall concept.
For unknown reasons, this title is not mentioned or listed on Phoenix Entertainment's official website, despite the fact that they animated the series.