Wolf was released in 2013 as the lead single from XOXO, the debut studio album by South Korean boy group EXO. The Korean lyric naega wolf translates to I am a wolf, and the extended howl became one of the song's most quoted hooks. As EXO grew internationally, fans clipped the moment for edits, compilations and jokes online, long after the original comeback era. The repeated 2x version keeps circulating because it compresses that whole history into an instantly recognisable sound for K-pop audiences.