On Saturday, the heart of Seoul turned into a sea of purple.
It was splashed across landmarks, towering billboards, giant screens on high-rises, posters, masks and t-shirts. It was in the display of drone lights on the Han River.
The reason for it was impossible to miss.
"Welcome back BTS," a banner on a 7-Eleven declared, surrounded by the K-pop act's signature colour. The world's biggest band was returning to the stage - after a break of more than three years because of mandatory military service.
"BTS is everything for us," says Veronica, who along with her friend Amanda flew in from the US to catch Saturday's show.
