☆NCT U's "BOSS," which includes seven members, including Taeyong, Jaehyun, Winwin, Mark, Doyoung, Jungwoo and Lucas, is a song of urban hip-hop genre that features heavy bass riffs, members' unique rap and vocals, and contains the lyrics that NCT needs true empathy, not fragmentary and superficial communication in modern society. Especially Taeyong and Mark participated in the lyrics.