On July 14, 2021, Sunmi's label Abyss Company confirmed in a statement to Newsen that the singer is in the midst of preparations for a "new album" and is "aiming for an August comeback".

[3] Sunmi unveiled the album's track listing on her official social media accounts and website, revealing "You Can't Sit With Us" as the lead single on July 26.

[5] "You Can't Sit With Us" was released for digital download and streaming as the lead single from 1/6 on August 6, 2021, by Abyss Company.

"[7] "You Can't Sit with Us" was written by Sunmi, while the composition was handled by Melanie Fontana, Michel Schulz and Ross Golan.

The song features a fast beat, addictive chorus, Sunmi's "breathy" vocals and aside from demonstrating her abilities as a vocalist, the singer is also seen exercising her rap skills.

[12] In a behind-the-scenes clip from the set of the "You Can’t Sit With Us" music video, the singer revealed that Marilyn Monroe inspired the choreography for the track.

"[9][8] Frustrated and annoyed, she begins to start tossing items out of her window, including a flowerpot that ends up smashing into her ex's head and presumably killing him.