It was released by Source Music on January 15, 2015, as the lead single of their debut extended play, Season of Glass (2015).
Written and produced by Iggy and Youngbae,[1] the song was described by Fuse as a "nostalgic gem that heavily recalls Girls' Generation's earliest work, from the sound to the energetic choreography".
[2] The song peaked at number 25 on the Gaon Digital Chart and has sold over 1,025,731 downloads, as of July 2016.
[6] In the monthly chart, the song debuted at number 78 for January 2015, with 75,229 downloads sold.
[7][8] In February, the song rose to number 43, with 81,131 downloads sold.