du-geun du-geun (heart pounding) is probably the most used onomatopoeia in K-Pop
But, in this song, Apink's hearts are like dumhdurum - a play on a word for being calm and the sound of a heart beating fast - which matches the more complicated feelings of a (overdue) breakup.
Apink 에이핑크 덤더럼(Dumhdurum) MV Performance Ver
#KPopMonday #TwoOfAKind (2 songs or MVs with something in common).
A little less obvious one:
Apink's Dumhdurum and Twice's I Can't Stop Me
Both were title tracks from 2020 and both MVs feature a train. Dumhdurum opens with train sounds and a pan of the members sitting in a rail car while ICSM closes with shots of the members in a train and train sounds after the fade out.
Dumhdurum - https://www.youtube.com/watch?v=WqzTRK5GPWQ
I Can't Stop Me - https://www.youtube.com/watch?v=CM4CkVFmTds
NikuNashi
mede