The stone walls of the 600-year-old Sungnyemun gate, a key national treasure of South Korea, lit up with alternating white and red logos of BTS and its new album, "Arirang." Accompanied by a deep rumbling sound,

Seoul was awash with the signs: BTS is back. Landmarks were illuminated. Museums launched exhibitions. Stores rolled out offerings in purple, the fandom’s signature color: pastries, ice cream, drinks, pizza. A drone show projected the faces of the K-pop supergroup’s seven members over the city.

Since Seoul city will literally hit a temporary halt on March 21 for BTS comeback show, there is speculation that HYBE would have shelled out quite a big sum for booking the Gwanghwamun Square and for other concert related arrangements.

Thousands of police prepare to deploy to South Korea’s capital ahead of K-pop’s most anticipated comeback