O!RUL8,2? is the first extended play by South Korean boy band BTS. It was released on September 11, 2013[1] as the second album after 2 Cool 4 Skool. The album consists of ten tracks, with "N.O" (also known as "No Offense") as the lead single. The group later promoted "Attack On Bangtan (진격의 방탄)", another track from the album