Before You Read <3

Nightcord at 25:00 is a mysterious music circle that operates at 25:00 AM (1 AM). The four members have no clue who each other are, until one day, a mysterious song called "Untitled" appears on their computers. What will they do when they need to save one of their own members through their music, before it's too late?
An Aphmau Project Sekai AU!