It's a song about someone deeply in love with a "tender" partner, dealing with the ups and downs of a relationship. Why is it Everywhere?
You can find everything from "Bass Boosted" versions for car speakers to "Slowed + Reverb" versions for "sad girl/boy" aesthetic videos. Rinna Rinna Rin Yarim
"My dream didn't come true / What will happen to me now?" It's a song about someone deeply in love