Naozumi Kurosaka and his younger sister Touko, students at the assassin-training institution "the Academy" Nagi and Shizuka once attended, arrive on Guicheng Island in pursuit of them. Members of Class A, they suspect Nagi is behind the spate of strange killings on the island. When Shizuka runs into them, they grill her about Nagi's whereabouts, and she finds herself in grave danger. — www.primevideo.com →