[2] In April, Wanna One announced that the members will split into multiple units and collaborate with different artists such as Dynamic Duo, Zico, Nell and Heize for their upcoming album.

It will contain the songs produced during their unit projects, which will be shown on the group's reality show Wanna One Go: X-con.

[7][8] Wanna One filmed the live performance of "Light" and the unit songs during their Day 1 Concert in Seoul on June 1, which was broadcast live on Mnet, the channel's YouTube account and the group's Facebook account, through the group's reality show, Wanna One Go: X-con on June 4.

It features the members Yoon Ji-sung, Ha Sung-woon and Hwang Min-hyun and sonically, sounds similar to the style of its writer Kim.

[13] “Kangaroo” is a summery hip hop track produced by Block B’s Zico and contains punky rhythms and melodies.