Song that I listen to when I study, take a walk, and work (공부할 때 들으면 좋은노래)

https://youtu.be/-nmNC-mE1dM?si=UjdHq72-Oc2hGGXS

Song that I listen to when I study, take a walk, go out, and work 공부할 때, 산책할 때, 외출할 때, 일할 때 듣는 노래