SEOUL — The lights inside the National Museum of Korea in central Seoul had already gone out for the night Thursday, but the marble-floored lobby still buzzed with quiet excitement. Dozens of BLACKPINK fans, phones raised and faces lit by a soft pink light, walked toward the end of the main corridor where an exclusive prelistening of the girl group's new album was about to begin. The event, co-hosted by the K-pop quartet and the museum in partnership with Spotify, offered about 300 selected fans a rare preview of "Deadline," a day before the album's release. It marks the quartet's first album involving all members in four years since "Born Pink." In the corridor known as the "path of history," a giant carpet reading "BLACKPINK WILL MAKE YOU" led visitors to a seating zone surrounding the digitally restored Gwanggaeto the Great Stele. The memorial stele for the tomb of Gwanggaeto the Great, the 19th monarch of the ancient Korean kingdom of Goguryeo (37 B.C.-A.D. 668), is an iconic national heritage of ancient Korean history. As the opening beats of last year's prerelease track "Jump" rev