Nico, a girl who has closed her mind from noise and whose only emotional support is her favorite coffee shop, one day meets Ryota, a boy who is being abused by his parents. Nico, who had been abused herself, could not forgive Ryota's parents.
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!
