It Turns Out I Am an NPC

[Single female protagonist + no CP + group portrait + suspense + supernatural] I originally wanted to write it as a main heroine, but I don't know how to write it as a group portrait. Let's just try to make it work. Yuyao often dreams, but every time he wakes up, he forgets what he dreamed about, and when he wakes up, he still holds a doll pendant in his hand. One time when she was taking the bus back to school late from get off work, she had another dream, although she forgot what happened in the dream. But this time she remembered that at the end of the dream, a girl gave her a doll pendant. After that, Yuyao's dream gradually became clear. She found that the people who fulfilled their wishes had disappeared in this world, but the people around her were envious of the disappearance of these people. This made Yuyao feel confused. In subsequent copies, Yuyao finally got the answer...