Shinnosuke Susumago

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!

A dream competition that transcends generations, from Showa, Heisei, and Reiwa! In the scorching hot summer of 2024, Kamen Riders who are "all the strongest" will run! Fall?! Compete!!! The strongest vs. the strongest! A one-time legendary match between heroes who have saved the world! This match... is completely unpredictable!!

Witness this beautiful yet cruel story that depicts the birth of the Three Dark Sisters and Risa Arisugawa, an ordinary girl who dreams of becoming a singer and was the model used to create Lachesis.