The band-aid on Katta Kirifuda's forehead -- used to suppress his uncontrollable power -- has peeled off. There seems no adverse effect at first. Suddenly, Katta's pet hamster Hamkatsu starts talking, revealing a big secret.

The 'V' mark that was once on Katta Kirifuda's forehead hides a mysterious force. However, the power was sealed off. Even though the impact of removing the seal does not do much, Hamukatsu starts to talk. Plus, more hamsters that are like Hamukatsu start to appear. They were then told about a secret organization, the "Rare Killers", with the members being transfer students of the school. What is the mystery of the hamsters like Hamukatsu and who exactly are the Rare Killers? The final battle is about to start.—Duel Masters Wiki