As we publish this, a viral country trap hybrid is the No. 1 song in the United States. The SoundCloud rappers who were just rogue, underground sensations a few years ago are legitimate superstars. A 17-year-old with no major radio hits topped the charts and broke streaming records with her debut album. It’s a strange and exciting time for music, and the world is ready for artists who push boundaries to the extreme. Enter a duo of brothers from Boston who go by the name Brevin Kim.