On September 16, it was announced that TripleS will start preparing for sub-unit debut activities with each unit having 4 members.
[1] The lineup was voted by fans and Acid Angel From Asia made their official debut with the first extended play Access on October 28, 2022.
[2] "Generation" was written and composed by Jaden Jeong alongside El Capitxn with Vendors, and Maria Marucs participating in the composition and arrangement.
[3] It was described as a dance song with "up-tempo house beat characterized by rock guitar",[4] with lyrics about "achieving anything even if there are difficulties if we are not afraid of challenging ourselves with healthy and bold energy".
"Generation" was composed in the key of E minor, with a tempo of 120 beats per minute.