On June 24, 2024, SM Entertainment announced that Taeyeon would be releasing a digital single titled "Heaven" on July 8.

[4] "Heaven" was written by Lee Oh-neul, Leslie, Moon Ji-young (Lalala Studio), and Jo Yoon-kyung, and composed and arranged by Dino Medanhodzic, with Maia Wright and Libby Whitehouse participating in the composition.

[5] It was described as a "dreamy" dance-pop song featuring "cheerful atmosphere" and characterized by "rhythmic guitar with a synth sound" with lyrics "comparing the refreshing moment of fulfillment to 'Heaven'".

[6] "Heaven" was composed in the key of E-flat minor, with a tempo of 114 beats per minute.

The "creepy atmosphere" visual depicts Taeyeon "preparing food with all her heart", with scenes switching between "her eating delicious food with her loved one", "her chasing 'Gomven' the bear", and choreography described as "embodying the refreshing and ecstatic feeling of reaching heaven" and featuring "free-feeling movements of [Taeyeon] running forward or dancing to the rhythm with [her] arms raised".