Anata no Koe ga Iroaseyou Tomo, Meiyaku no Uta ga Sono mune ni Todokimasu you ni (貴方の声が色褪せようとも、盟約の歌がその胸に届きますように, Even if Your Voice Fades, This Song of Oath Shall Reach You) is one of the character songs sung by Daisuke Ono, Sebastian's voice actor, for the third disc in Kuroshitsuji Sound Complete Black Box.