Who is LOONA?? (Reacting to top Spotify songs)

This was a kpop group I knew NOTHING about! Instagram: @shelbyshufflemode X: @shelshufflemode Intro: 00:00 Heart Attack: 1:41 PTT (Paint The Town): 4:23 Hi High: 7:13 Butterfly: 10:00 Why Not: 12:56 Initial thoughts: 15:27