Red Velvet released Be Natural in 2014 as a remake of S.E.S.'s 2000 song, with a then-trainee Taeyong of SM Rookies featured on the rap. The track marked an early showcase for Taeyong before his debut with NCT, and its sleek R&B sound helped establish Red Velvet's more mature early image. Short clips from the song continue to circulate among K-pop fans, who reuse Taeyong's section in edits and compilations celebrating his pre-debut work and Red Velvet's early discography.