Album release from Akiko Shikata featuring the PlayStation 3 game "Ar tonelico Qoga: Knell of Ar Ciel." The album includes the theme of the game "Utau Oka - HarmonicsTILIA - (full-length version)," "Ec Tisia - Talifa -," and her new song(s). Limited edition includes a booklet with four episodes, setting guide, and more. Features AMARAY case.