What makes Be Natural by Red Velvet notable?

'Be Natural' was well-received, earning critical acclaim for its mature sound, which contributed to Red Velvet's rise in the K-pop genre. The song's success helped establish them as a leading act in the industry, influencing the direction of future girl groups aiming for a similar R&B aesthetic. Released in 2014, 'Be Natural' marked Red Velvet's first foray into the music scene after their debut with 'Happiness' earlier that year. This single showcased a more mature sound and solidified their versatility as artists, transitioning from a bright, bubbly image to a sophisticated R&B style.