If You (구르미 그린 달빛 OST)

Ailee's "If You," from the smash historical drama *Love in the Moonlight*, is a powerhouse OST ballad that showcases why she's regarded as one of Korea's premier vocalists. The arrangement builds classically — tender piano and strings that gather force beneath her — but everything exists to frame the voice, which moves from restrained, aching low notes into soaring, belted climaxes delivered with pristine control and real emotional heft. Ailee sings of longing across distance, the hope that if the beloved calls, she'll come running, and the song's emotional core is devotion strained by separation, perfectly mirroring the drama's forbidden royal romance. Her tone carries that distinctive blend of American-trained R&B power and Korean ballad sentimentality — she can wail without losing tenderness, an instrument that finds catharsis in the biggest moments while still sounding wounded. Within the deeply codified world of K-drama OSTs, "If You" is a standout, the kind of theme song that eclipses lesser dramas but here matches a beloved one, cementing itself in the cultural memory of everyone who watched. It's built for peak emotional scenes and for solo listening when you're missing someone — a song to belt in the car or absorb through headphones during a long night. Grand, sincere, and technically dazzling, it trades subtlety for a full-throated emotional payoff.