It's not a sad song, but that song reminds you of a specific time and you just can't bring yourself to listen to it.
Mine is NCT Dream's Diggityㅋㅋㅋ I also can't even listen to Dive Into You's intro because I'll cry right away,,
-Ann-Marie's 2002. I listened to it so much at one point and now I can't even listen to it again because I'm afraid I'll miss that time. I don't know if the song itself is sad or not, though.
-BTS' Tomorrow
-iKON's Wait For Me
-X1's Flash
ㄴI'm tearing up just by seeing their name😭 This is also exactly why I don't listen to Wanna One's songs anymore
-SHINee's An Encore
-OSTs of Moon Lovers: Scarlet Heart Ryeo
-SHINee's Please Don't Go
-EXO's Peterpan
-Yook Sungjae's Talk... The song itself is not that sad, it's just that the song reminds me of a specific time back then and it makes me sad, which is why I can't listen to it anymore
-iKON's Wait For Me and Long Time No See
-Lee Hi's Breathe
-Listening to Infinite's Tic Toc and Feel So Bad consecutively makes me feel like the main character of an MV
-Jonghyun's Before Our Spring
