From March to June 2022, WJSN participated in the Mnet's reality-competition program Queendom 2, and finished as the winner.

[1] After the show, on June 3, Starship Entertainment announced that WJSN will be release the new music after a year and four months in July through a "coming soon" poster, uploaded on the group's social media platforms.

[2][3] The poster, which simulated the look of the ocean floor, also noted that the group is set to release new music on July 5 at 6:00 pm KST.

[14] The title track "Last Sequence" is a pop-style dance song with a "wild bassline, drums and synths that makes the melody stand out even more" as it inherits the "splendid concept of WJSN".

The third and the Queendom 2 winning song "Aura" is also re-recorded with the inclusion of Dawon who was on hiatus during the finale and it is the only track of the album that will be available for physical copies only.