Help finding this kpop song!!

My memory is kinda fuzzy since I remember obsessing over it back in 2021-2022. I think it was sung by like a guy but all I can remember is the music video.

If I remember correctly, the thumbnail was of these 2 teenaged girls (with highschool uniforms) sitting across each other with a TV (i think?) in the back. They were in love but their love was forbidden? There were some repeating chorus like la-la-la-la..and at the end of the music video, it seems that they had both ran away from their home and were now at the beach holding hands. It's as much as I can remember and the song was quite catchy, hope it makes sense!! 😭😭