As a korean looking for this song who could just look up the 한국어로 lyrics finding the song, my heart goes out to everyone else who spent so long finding it. But it is such a banger ❤ (I also came from that one manga/game like ad 😭)
This sounded so much like a kpop song that when I Shazamed this, I was confused and thought it gave me a cover. Only after a couple tries and a quick YT search did I realise that this is actually the original! 😅