Billboard and the members of LE SSERAFIM, SAKURA, KIM CHAEWON, HUH YUNJIN, KAZUHA and HONG EUNCHAE show you the behind the scenes of their music video for “Easy.” LE SSERAFIMHi Billboard we are LE SSERAFIM, I’m Hong Eunchae, I’m Sakura, I’m Huh Yunjin, I’m Kazuha, I’m Kim Chaewon, and