With less than a week left before BTS’ comeback performance at Seoul's Gwanghwamun Square, authorities plan to tighten security around 31 buildings surrounding the plaza, according to news reports Sunday. Police and the Seoul Metropolitan Government recently held talks with the operators of the buildings and reached an agreement for six of the buildings to close their front entrances and allow access only through rear entrances, while urging the remaining 25 buildings to restrict access to rooft