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When the Cosmic Invading Grand Racing Crew, Hashiriyan intends to expand their territory with Earth being their next target to take over, five genius mechanics join forces with an alien machine named Bundorio Bunderas to create their own supercars and special equipment to defend the planet as the Bakuage Sentai Boonboomger!
Following his win in the Desire Grand Prix Bonus Stages, Michinaga realizes that when it comes to the DGP, be extra careful what you wish for...
As the title suggest, in order to "supplement" the series, they will delve into the story that could not be fully depicted in the TV series. This includes behind-the-scenes stories related to the show's production, and even the settings of the work and the characters. In each episode, tips about the story and setting of the series are "confessed" one after another from all sides. What kind of confessions will come out?
The story centers on a fearsome samurai, once feared on the battlefield for his great skill. But after his clan came to ruin, he has since lived a quiet and humble life, his intimidating face the only proof of his previous warrior life. One day, he encounters a curious corgi dog, who he is immediately taken with, and they begin a life together.
