Arriving at the royal capital of the Kingdom of Roden, Ark reunites with Chiyome, a girl with animal ears. Ark, who was begged by Chiyome and helped rescue the captive beast humans, participated in an assault operation on the royal capital's largest slave trader, Etuat Shokai. The night of the decisive action ── Ark teams up with Goemon, a ninja who is a fellow of Chiyome and has a muscular bone, and sets out a frontal breakthrough against a company with strict guards.