In July 2007, Girls' Generation had their first stage performance on Mnet's School of Rock, where the group performed their first single, "Into the New World" (다시 만난 세계; Dasi mannan segye).
Pada bulan Juli 2007, Girls' Generation menjalani penampilan pertama tak resmi di Mnet School of Rock, di mana mereka membawakan singel pertama mereka yang berjudul "Into the New World" (다시 만난 세계, Dasi Mannan Segye).