Place it as the reply beat after a setup line in your edit, not under dialogue. Follow a flat reaction with the Faaaa meme sound for a second vocal answer, or swap this in where a huh reaction would normally close the scene.
이 사운드에 대해
This is a very short clip, under a second long, built around a single voice stretching out the sound 'maaaa' in one drawn-out call. It lands as playful and slightly whiny, the kind of exaggerated vocal noise that turns a plain reaction into a joke without needing any actual words.