Chapter 1 - Zhou Yanli: 30 years old, an otolaryngologist at the Provincial Hospital. There is a star-shaped scar on the inside of his left wrist. He carries lime balm with him everywhere.
- Jiang Qingwu: 23 years old, a music graduate with hearing impairment in his right ear. He runs a glass greenhouse beverage shop called "Star Track" in Lime Lane.
The second chapter of the coded music score carved by Lu Xinggui's mother in the piano room resonates with the music therapy recommended by Qing Ning's psychiatrist
