방과후 태리쌤 OST Part 4

'Happened,' the title track of 〈Curtain Up, Class〉 OST Part.4, is an acoustic folk song that captures the awkward air and subtle emotions arising from misunderstandings between people. By asking the honest question, "What happened to us?" in a light yet sincere way, the track delicately unravels the strange distance and feelings felt within relationships. In particular, Isaac Hong, loved for his unique sensibility and solid vocal skills, participated in the vocals to maximize the song's quality. His simple yet deeply resonant voice harmonizes perfectly with the acoustic guitar melodies, vividly conveying the emotional waves experienced by the characters to the listeners.