The BGM in This World Is Off!

BGM exists in this world, and whenever an event takes place, the music changes. People ignore its existence and are influenced by it unconsciously, but Bai Guimei, who transmigrated here, can hear it clearly. So why is the BGM she hears so strange? "GayliGayqiAi~" "Uh, why this song... Huh, why did the BGM suddenly change?" As she listens with her eyes closed, she fails to notice the door behind her silently swinging open... Death always comes quietly when you least expect it. If you want to stay alive, listen carefully.