This sequel to Versus Revolution continues the chain of events following the battle between the Invaders and Revolutionary. It also serves as the final season and conclusion of the Versus saga in the anime. The 'V' mark that was once on Katta Kirifuda's forehead conceals a mysterious force, though that power has been sealed away. Although breaking the seal has little impact, Hamukatsu begins to speak! Additionally, more hamsters resembling Hamukatsu start to appear! They are then informed about a secret organization called the "Rare Killers," whose members are transfer students at the school. What is the mystery behind the Hamukatsu-like hamsters, and who exactly are the Rare Killers? The final battle is about to begin!