"Comeback When You Hear This Song" is a song recorded by South Korean boy group 2PM for their third studio album Grown. It was their first single of the album, released by JYP Entertainment on May 6, 2013.
On April 30, 2013 JYP Entertainment revealed the title and track list of 2PM's third studio album, which would have two title tracks: "Comeback When You Hear This Song" and "A.D.T.O.Y." On May 6, 2013, 2PM released the music video for "Comeback When You Hear This Song" and the album Grown, minus the second title track, "A.D.T.O.Y."
"Comeback When You Hear This Song" was written and composed by JYP Entertainment founder Park Jin-young, with the rap section co-written by 2PM member Ok Taec-yeon. The song is composed in the key C major at a rate of 125 beats per minute and with a running time of 3 minutes and 38 seconds. "Comeback When You Hear This Song" has the emotional melody and lyrical lyrics that contain the sad heart of a man who regrets a breakup.
On May 16, 2013, 2PM held their first comeback stage for the song on Mnet's M Countdown.