"Forever" (약속) is the second digital single by aespa. It was released on February 5, 2021 and is a remake of the song of the same name by Yoo Young Jin from the SMTOWN album Winter Vacation In SMTOWN.Com.
On January 29, 2021 the hashtag #늘_네_옆에_난_서있을게 (#I_will_always_stand_by_your_side) was promoted by the group's official Twitter account, it was later revealed that the group would release a surprise single "Forever" on February 5. On February 4, SM Entertainment announced that the group would release a series of performances for the single in the following days with various concepts.
"Forever" was described as a song with a cozy winter mood.
On March 12, 2021, official merchandise was made available through SMTOWN &STORE. On March 19, additional official merchandise was made available through the SM GLOBAL SHOP.
|Chart (2021)||Peak position|
|South Korea||Gaon||Download Chart||28|
- Music video
- The performance stage: