Written and composed by IU, Oh Hyuk, and Lee Jong-hoon, and produced by the latter, the song served as her second pre-release single, released on April 7, 2017.

"Can't Love You Anymore" debuted at number three on the Gaon Digital Chart, below IU's own "Through the Night" and Winner's "Really Really".

On March 25, 2017, the day after her lead single "Through the Night" was released, IU had already begun teasing "Can't Love You Anymore."

"[3] She also revealed that the track would feature lead singer Oh Hyuk from the band Hyukoh due to the fact she admired his vocal color.

On April 4, IU continued to tease her next single by posting the art cover online, featuring the two singers on a yellow background.

[citation needed] The track was written and composed by IU and Oh Hyuk, while it was produced by Lee Jong-hoon[4] It runs for three minutes and fifteen seconds and is performed in the key of E minor.

[citation needed] The song shot to the top of the Instiz iChart upon release, and eventually achieved a Perfect All-Kill, as the single hit number one on all of the major South Korean music sites simultaneously.