Hello cdrama lovers!

I was browsing Tiktok and stumbled upon this song in Vietnamese, and it sounds VERY similar to a Chinese OST for that aired between 2020 - now (only because I started watching cdrama during the pandemic). Can somebody help check to see if this song rings a bell for anything? I feel like I have gone through almost every OST for drama that I have watched the past four years but I still can't find it and it is killing me.

Link for song: https://www.youtube.com/watch?v=L8nLVTrlz_c

Please tell me it sounds familiar to somebody and I'm not just going insane.

Thank you so much in advance!

Not sure if this is helpful, but it sort of reminds me of multiple OSTs from Till The End of the Moon (寄长月 the most but also a bit of 寻常歌 and 要不然我们就这样一万年)