Shortly after the report, SM confirmed that the singer would release a solo project sometime next month, although a specific date had not been announced at the time.

Prior to the EP's release, Wendy had been on a year-long hiatus due to a stage accident during the 2019 SBS Gayo Daejeon music festival.

[10][11] Written by prominent South Korean songwriters Kenzie and Yoo Young-jin, the song offers Wendy's deepest epiphanies as she reflects on her blessings from those who've been by her side at every step of life.

[citation needed] The gentle mix of guitar and band sounds in the song keep the rhythm ebullient before she wraps up with a soothing outro and reinforces the chorus with her signature high-notes.

[12] "Best Friend" features fellow Red Velvet bandmate Seulgi and explores various genres ranging from pop to rock.