It was released digitally on April 10, 2016 by SM Entertainment, just a day after the group's debut single "The 7th Sense".

Musically, "Without You" was described as an EDM rock genre song with intense electric guitar sounds.

[1] At midnight of August 10, "Without You" sung by NCT U's Taeil, Jaehyun, and Doyoung was released through various sites.

The single includes a Chinese version of the song as a bonus track which additionally features vocals from then-SMROOKIES member Kun.

[2] The lyrics of this song tell us about the happiness of understanding each other and living together in an era of intense competition.