Yamato Delgado is just an 11-year-old boy, but he especially loves D-baman. From an early age, he was inspired by his father to form his dream of becoming B-DaChampion. However, he discovered that the organization: the Shadow League is trying to use this sport to dominate the world in the upcoming Winners tournament at D-Baworld. Yamato joined with his friends, but the legendary Cobalt Blade was later destroyed by the betrayer Cain McDonnell. Despite the serious loss, thanks to the encouragement, he continued to fight again and rebuilt his robot with the new name: Cobalt Saber. It is considered a quality upgrade, when it converts from the power system to the Core System, allowing the core of body parts to be swapped. However, with the might of the shadow alliance, can Yamato and his D-Baman successfully prevent it?
