Sweet Night by V

It's part of the OST from the korean drama "Itaewon Class" released on March 13, 2020. On July 7, 2020, Sweet Night broke the record for most #1 iTunes worldwide for songs by soloists (102), previously held by Adele's "Hello" and, on the next day, it broke the all-time record for song with most #1 iTunes worldwide (104), surpassing his own group BTS' "Black Swan". Currently, the song has reached #1 iTunes in 118 different countries. Also is the most streamed OST on spotify. .