First Arc - Zhou Yanli: 30, an ENT doctor at the Provincial Hospital, with a star-shaped scar on the inside of his left wrist and a lime-scented balm always on hand
- Jiang Qingwu: 23, a music graduate with hearing loss in her right ear. She runs a glass conservatory drink shop called “Star Trails” on Lime Lane.
In the second arc, the coded score that Lu Xinggui's mother carved into the music room resonates with the music therapy recommended by the psychologist on Lime Lane.
