No one represents first-generation K-pop better than H.O.T., the premier boy band of their era. The 1996 smash “Candy” mixed sunny bubblegum pop and gentle reggae rhythms, and the hype stayed with them even as they started introducing more hard rock sounds into the music—at least once going so far as death metal grunting. H.O.T.'s wide range of musical styles, from adorable to angry, set the tone for generations of idol groups to come.