Joe's battle with his new sidekick, Momoking, begins! Joe Kirifuda, who freely draws creatures, is the hero who creates and fights cards with his buddy Deckie! After saving the "Creature World," a world inhabited by Duema's card creatures, Joe, now a fifth grader, gains the power to mix the powers of Earth's heroes and heroes to create cards.

Then a boy named Abaku, the most powerful boy in the popular Duema app, appears in front of Joe. He uses a demon creature that Joe has never seen before. Joe struggles greatly against the army of demons. The new trump card he has created to defeat the demons is... Momoking, the Momotaro Dragon! The battle with Joe and the Momoking begins!