The manga Bakusou Kyoudai Let's & Go!! follows two main seasons centering on the Go brothers and their rivalry with the TRF Victorys. In its third season, Bakusou Kyoudai Let's & Go!! MAX introduces two new central characters while keeping the core theme of racing intact. The story revolves around Retsu and Go Seiba, siblings who are gifted with 'Mini 4WD' racing cars by Dr. Tsuchia. As the narrative unfolds, the series delves into the brothers' journey of training and customizing their vehicles in preparation for the prestigious Japan Cup, a competition where the country's top racers vie for supremacy.