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Accepting Hikaru's wish to "stay here," Yoshiki decides to investigate what Hikaru really is. A memo left by the real Hikaru mentions "Nonuki-sama," but Hikaru's memories of it are vague. Then, Hikaru's grandfather suddenly asks him, "Where did you put Hichi-san?"—deepening the mystery even further. Meanwhile, signs of impurities begin to gradually appear at school...