Shops and restaurants in downtown Seoul were adorned in purple Thursday as businesses eagerly embraced the symbolic color of K-pop group BTS ahead of its highly anticipated comeback show this weekend. The seven-member act is set to perform at Gwanghwamun Square on Saturday to mark the release of its fifth studio album, "Arirang," and preparations have been under way at all levels -- from the district government to the prime minister's office -- to ensure a safe and enjoyable event. Around 260,000 fans and visitors from around the world are expected to descend on the streets stretching from the square to Sungnye Gate to witness the return of one of K-pop's biggest success stories. Outside a raw fish restaurant found west of the square, a small vase of purple flowers decorated the entrance, while employees of a nearby coffee shop wore ribbons in the five cardinal colors of Korean tradition to welcome foreign visitors in an authentic fashion. "Back when business was very hard due to the pandemic, I was soothed by BTS' songs, so I'm very happy that they will be performing not far from here,"