안녕 (What's Wrong with Secretary Kim)

Paul Kim's "안녕," the OST anchor for *What's Wrong with Secretary Kim*, is drama-ballad craftsmanship done with unusual restraint. The production follows the genre's blueprint — piano opening, strings gathering, a final chorus opening into full arrangement — but Kim resists the temptation to oversell it. His tone is clean and slightly boyish, with a soft attack on consonants that makes the delivery feel intimate rather than declamatory, and he saves his upper register for the last chorus so it lands as release rather than as showing off. The title is Korean for both "hello" and "goodbye," and the lyric lives inside that ambiguity: a greeting that carries the whole weight of everything unsaid before it, the moment two people finally arrive at each other after years of near-misses. That's precisely the show's premise, and the song does its structural job — it's the sound cue that tells a viewer to feel now. Kim built his career on exactly this lane, becoming one of the most reliable OST voices of the late 2010s. It works outside the drama too: a walk home after a good evening, or that specific pause before you say something you've delayed for too long.