It is a spinoff of The King of Braves GaoGaiGar, produced under the direction of Yoshitomo Yonetani and writer Hiroshi Yamaguchi.

In the year 2006, the world is affected by a mysterious disease dubbed "Algernon" that causes mass suicides and murders.

Meanwhile, while preparing for the opening ceremony at the geofront underground amusement park "Bottom the World", a mysterious mass fatality accident occurs.

Kakuseijin 01 was stranded after Hinoki's partner, the head diver Cactus Prickle, suddenly disappeared.

Following the 2012 closure of Bandai Entertainment, Sunrise announced at Otakon 2013, that Sentai Filmworks has rescued Betterman, along with a handful of other former BEI titles.