I Rule the Paranormal with Background Music

In 20XX, dark energy ran rampant, bringing the apocalypse to Earth. Strange regions appeared across cities and wilderness, filled with countless monsters born from dark-energy corruption. People called these places "Necropolis Playgrounds," meaning paradises for demons and ghosts. The survivors established new territories, but with food running short, the monsters secretly left their playgrounds and mingled with human society, seeking new delicacies. This isn't reality. It's the setting of the hit horror novel Necropolis Playground. You transmigrated. Now you face a series of bad news and good news. Bad news: You transmigrated into Necropolis Playground. Good news: You're not the protagonist, so you won't have to get dragged into supernatural movie sets again and again, unable to live or die. Bad news: You're the protagonist's classmate, the unlucky one who gets killed off right at the start. Good news: You have a special ability. You can hear the background music of horror movies. Bad news: It only kicks in when danger is near, and the side effect is that you always end up in the wrong place at the wrong time. Good news: ...At the same time, you discover that you can influence the villains and make them act according to movie logic, no matter what kind of movie it is. Yu Ning: ... From then on, she has only two goals in life. First, never let any other sound interfere with her ability to hear the background music. Second, find ways to make the monsters' "actors" break character and mess up their takes. - Years later. Yu Ning, inexplicably hailed as the star who saved the world, sat at her desk and solemnly wrote the subtitle for her memoir. --The Years I Turned Horror Movies into Comedies. NG means "not good." It refers to a shot in which an actor makes a mistake, cracks up, or fails to deliver their best performance during filming. Reader's note: 1. A spur-of-the-moment idea to unwind before bed. Slightly Lovecraftian. Length undecided. 2. A mix of horror movies. Not sure how much of it will be original, either. 3. The male lead might possibly be the original protagonist. Theme: A smile takes ten years off your age