2YA2YAO!

It was released on January 28, 2020, as the lead single for the repackaged album by SM Entertainment, Label SJ and it was distributed by Dreamus.

features the vocals of eight active Super Junior members — Leeteuk, Yesung, Donghae, Shindong, Eunhyuk, Siwon, Ryeowook, and Kyuhyun.

Heechul's vocals could still be heard in the main album (and its eventual reissue) and would still appear in the group's variety shows.

The label further announced that the title track will be written and composed by Block B's Zico and teased the fans that the group will be exploring a new musical style that has never been shown in their previous releases.

is considered Super Junior's first attempt at the hip-hop genre, a departure from their most titular tracks that leaned into pop and R&B sounds, or more recently Latin-pop prior to the song's release.

[8] Composed by Zico, Pop Time, and Dem Jointz, the song features rapid melody changes to focus on each Super Junior member's distinct sounds with some funk and synth-pop rhythm.

[14] The song was originally planned to be promoted live alongside the repackaged album with a studio audience at the group's "Super Junior The Stage" event on January 28, 2020, which eventually would be recorded behind closed doors owing to the COVID-19 concerns in South Korea.