City Z is a port city that has been polluted by oil. On weekdays, it is no different from other big cities.
When dusk falls, don't be surprised if you see deserted streets before midnight—dark night is the time for those with supernatural powers.
"Wind Shadow Society", "Hymn of Hell", "Canyon Military Academy", all names that sound strange to others, are both fear and legend for every resident of Z City.
A symphony that lingered in the shadow of City Z for nine days, telling the story of reunions, grudges, confrontations, and partings.
Shh, don't make a sound.
The prelude of the song begins.