This one-shot originally appeared in 1975 as textless illustrations in the Japanese book (エッセイ集 微熱少年) which contains a collection of essays written by former Happy End member Takashi Matsumoto. In later re-releases of this one-shot, additional Japanese text would be added to some of the one-shot's pages.

A one-shot pilot manga, involving battles between more-or-less holographic Digimon. However, this manga was published as a special in volume two of Digimon Adventure V-Tamer 01, where an omake page by the author explained that the hero of this manga, Kentarou Kamon, was the source and inspiration for the design and character of Taichi Yagami, the protagonist of V-Tamer 01. *Note: Published in Akamaru Jump 1997 Summer*