It was written by CL with additional lyrics penned by Hyukoh's Oh Hyuk, whilst production was handled by J Gramm and Rook Monroe.

[1] CL revealed in an interview that the song was originally meant to be a letter addressed to Minzy upon her departure from 2NE1 in April 2016.

[2][3] Following the group's disbandment in November 2016, CL altered the track's lyrics to reflect the remaining members and changed the original plan to release it as 2NE1's final song as a tribute.

[5] Musically, Atwood Magazine described the song as an "elementary down-tempo ballad that fuses constant guitar strumming in tandem with the poignant tear-jerking lyrics.

[7] Internationally, it became the group's second single after "I Am the Best" to top the Billboard US World Digital Song Sales, garnering 5,000 paid downloads in the US within a week.