Riku Kagami tells Soji of the story of The Red Shoes and explains that both Kabuto and Gattack has a system that forces the wearer to destroy all Worms, regardless of the wearers' will. After Kabuto goes insane and almost kills Daigo, Gatack stops him but is unable to prevent Daigo's death by Cochlea Worm. In the end, Soji and Arata make a pact to stop each other if they ever try to destroy Hiyori.