Rurigaki Yoruko no YuigonRurigaki Yoruko's Last Request; 瑠璃垣夜子の遺言; 瑠璃垣夜子的遗言; Последнее желание Ёруко Руригаки; 瑠璃垣夜子的遺言; 루리가키 요루코의 유언

Yoruko thinks that the murder her brother committed seven years ago is a secret to only between them. But the sudden appearance of the victim's hairpin as a present during Ryuuichirou's birthday party makes Yoruko wonder if somebody else knows about their dark secret.