Pollalla Store, located on a quiet street in Seoul’s youthful and artsy neighborhood of Hongdae, is a hidden hunting ground for “Y2K” culture fans. The underground venue is filled with one-of-a-kind vintage items from the late 1990s and early 2000s, including first generation K-pop star merchandise. Hyun Tae-jun, the store’s 57-year-old owner, spoke of a distinct shift toward a younger demogra.