[1] He began developing the album while working on Bad Love, and took inspiration from various retro horror films, such as Friday the 13th, Gremlins and Mars Attacks!.

[5] Lead single "Gasoline" is a hip hop dance song that features chanting laid over brass and drum sounds.

[8] "Burn" is a pop song that features piano riffs, a strong bass and rhythmic electric guitar sounds.

Synthesizers and drums combine to create a dark mood, and the lyrics describe being unable to forget a partner after a break-up.

Finally, "Easy" is a midtempo pop song that features heavy 808 bass, sub-bass and drums, with strings in the second half.

[16] On August 9, 2022, Key's agency SM Entertainment announced the album's release through the publication of a teaser poster on Shinee's social media accounts.

[17] Key performed the lead single for the first time at the SM Town Live 2022: SMCU Express concert at Suwon World Cup Stadium.

[14] Key hosted a countdown livestream on August 30 through Shinee's YouTube and TikTok channels to celebrate the album's release.

[18] The set where he shot the teaser images for Gasoline was available as a photo zone for fans at SM's Seongsu-dong office until September 13.

[15] Ahead of its release, Key collaborated with graphic designer DHL on an art exhibition themed around the Year of the Rabbit.

[21] NME reviewer Tanu I. Raj praised Key's songwriting abilities, stating that the songs he contributed lyrics to were particular standouts.