Gao Mikado, a 6th year student of the Aibo Academy Elementary Division, is partnered with Dragon of the Sun, Bal Dragon, a monster born from a mysterious egg. To earn the coveted title as the strongest fighter in the world, Gao and Bal team up to challenge other fighters in the "World Buddy Cup". The two will have to battle others in a card game called Buddyfight, which allows monsters to fight alongside humans as buddies. Their rivals include ex-Buddy Police Tasuku Ryuenji, and the self-proclaimed strongest combination, Gaito Kurouzu and his buddy monster Black Death Dragon, Abygale.

Meanwhile, evil-doers are aiming to acquire Bal's special abilities. Kyoya Gaen, and his buddy monster Demonic Demise Dragon, Azi Dahaka are up to no good. Kyoya is already one of Japan's richest icons and is also rumored to be one of the strongest Buddyfighters in the world. What could they possibly be aiming for? And why are they seeking this "Ultimate Dragon Power”? With the passionate shout of an impact call, let the power of the impact monsters be known! Now let's raise the flag!