The song was released four days before IU's upcoming A Flower Bookmark 2 album, to coincide with the singer's ninth anniversary in the industry.

At midnight of September 18, IU uploaded the cover of the song into her Instagram account informing the fans to wait for a present at 7 in the morning.

"Autumn Morning" is a minimalistic folksy song that starts a capella style, remaining this way for a full minute before a guitar comes in, steady and straightforward.

The track is a cover of the original song by Korean folk singer Yang Hee-eun and guitarist Lee Byung-woo released in 1991.

The singer also collaborated with guitarist Jung Sung-ha and folk musician Hareem to add soothing guitar and tin whistle elements to the middle third of her update of the track.