[1] It was also released in Japan on 4 April 2012 by Avex Trax, as a CD single with Japanese and Korean versions of the songs.

It also contains an interpolation of the song "Funkytown" by Lipps Inc. "First Love" is a two-minute piano ballad written by Donghae which serves as a prelude to the title track.

[4] Another version was released on 21 December 2011 and was edited and directed by Super Junior member Shindong, marking it his directorial debut.

[5][unreliable source] In this video, there are cameo appearances by Amber of Korean girl group f(x), Youngsky, Peter of One Way, and Shindong.

The pair then held a fan meeting, Premium Mini Live Event, in support of the single on 11 April at Shibuya-AX, Tokyo.