1. "The Background Colour Grows Ever Beautiful" by Kim Hak-jung

In the debut episode, Hyunjin reads "The Background Colour Grows Ever Beautiful", written by Kim Hak-jung.

2. "The Song Did Not Echo" by Im Gyung-seob

Kim Lip reads "The Song Did Not Echo" written by Im Gyung-seob.

3. "Now We" by Park Joon

Haseul reads "Now We" written by Park Joon.

5. "Orange" by Kim Sang-mi

ViVi reads "Orange", written by Kim Sang-mi.

6. "Adolescence" by Park Sang-soo

Yeojin reads "Adolescence", written by Park Sang-soo.