While Tasuku is off training and getting rest in the world of the monsters, the Buddy Police sees the need to deputize some of the champions to help protect the Earth. Gaou, Tetsuya, and Kisaragi Zan'ya are among those deputized, and it's just in time: a new enemy named Ikazuchi arrives with the deadly 100 demons, all rogue monsters. Now the champions and the Great 8 monsters must fight to protect the Earth from being consumed by these new rogues.

Source: ANN

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Prequel: Future Card Buddyfight
Sequel: Future Card Buddyfight DDD