_Shinkyoku S ōkai Polyphonica_ franchise branched into several different
series identified by color. Original series are known as crimson red, while
the later series include black and white stories. This game is the only from
the black series and setting is the same as in the original crimson red
series, featuring two episodes. First episode takes place around the same time
as episode 0 of the original series. _The Black_ series feature Managa, a
Rusha Police Department detective in a spirit division department, who is also
a winged spirit himself, as one of the protagonists.
Initial release also included a bonus soundtrack featuring six tracks.