The lyrics explore the feelings of reaching the age of 31, contrasting childhood dreams of becoming doctors or teachers with the reality of adult life. It captures the sense of still feeling like a "child" while realizing that "nobody can be forever young".
The track is categorized as indie, folk, and blues , featuring a light, acoustic mood that highlights the vocal chemistry between the two artists.
Dalchong (CHEEZE) noted that the collaboration happened very quickly, with the song being "wrapped up in just two hours" because of their strong professional synergy.
Both CHEEZE and Stella Jang are credited as the song's writers and composers, with arrangement by Kim Dong-min.
is a sentimental K-indie collaboration single released on July 13, 2021, by singer-songwriters CHEEZE (Dalchong) and Stella Jang . Key Features of "31"