Shinkyoku Soukai Polyphonica Black

This manga is part of a series that shares a timeline with another work titled Polyphonica Crimson. The titles follow a naming pattern that includes the words "Shinkyoku Polyphonica," followed by a word in English, and then the Japanese term for black. The sequence includes titles such as Inspector, Silent, Player(s), Triangle, Resolution, Patient, Memoirs, Reliance, Isolation, Liberation, Adoration, Promised, and Advent. The series was left unfinished after the author's death in 2010, and no further information about its continuation has been released.