I absolutely love this song, even made a post about it a couple of months ago too. I don't think there are too many songs by this group (BTS) that I don't like. It is cool your friend is just getting you into Kpop, it is a wonderful genre of music and so many good songs have come out over the many many years even I have been listening to it, and even the ones before. Hope you have fun exploring this genre. If you like these guys I recommend also checking out some of their others: Fire, Dope, Mic Drop, Go-Go, Blood Sweat & Tears (this one is a must). Have fun!