Since its 2009 debut, BEAST has joined the ranks of K-pop's top boy bands, thanks to an unwavering artistic vision guiding the music: intensely emotional and often dark, with deep, multi-layered production and mesmerizing melodies. Early singles like “Shock” have a buzzy electronic verve, but as the six members have matured, their music has become more rich and relaxed, spanning industrial dance tracks (“Shadow”) and acoustic, bongo-beat ballads (“Bi Ga O Neun Nal En”), all with their characteristic melodic smoothness.