Crowned as the winners of the 2023 MTV VMAs Best K-Pop, Stray Kids return with ‘ROCK-STAR’, in a ‘POSTCARD VER.’ specific to each member of the group. Contents of the album include: CD (per version), Outbox (random 1 of 8), postcard set (per version), lyrics paper, mini folded poster, photo card (random 1 of 8) and additional photo card (random 1 of 8).