Ending a hiatus that began in 2022, the septet recapture a distinctiveness that had been threatening to ebb away

The K-pop supergroup BTS returns from their military service with a handful of surprises.

BTS, or Bangtan Sonyeondan (Bulletproof Boy Scouts), debuted in 2013 under BigHit Entertainment, and they have taken the world by storm ever since.

Before the boy band returns on Friday with “Arirang,” listen to key albums and solo releases by its seven members.

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. Three years later, “Dynamite” showed a totally different extreme ...