Oneus, pronounced "one us,"debuted in January 2019 as the first boy band from the entertainment company RBW, home to the girl group Mamamoo. Oneus is the "brother" band of Onewe, pronounced "one we," which debuted just four months after. Oneus has been famed for its traditional Korean concept, evident in songs like "LIT" (2019) and "LUNA" (2021), using traditional sounds, attire and dance moves in the songs. All members are also Korean, which has become uncommon in fourth-generation K-pop.