BTS were already massive in their native South Korea in 2017 when they scored one of their defining hits, the emotional ballad “Spring Day.” It was a poignant tale of grief and loss.

But today, it’s the time of Spring Day, the song of grief, loss, and yet, a renewal of hope. It’s the song that signifies a parting, yet with the bittersweet knowledge you’ll meet again.

BTS's "Spring Day" has made history as the first song to surpass 1 billion streams on South Korea's Melon, solidifying its status as a timeless classic. The track, released in 2017, ...