O!RUL8,2? (Oh! Are you late, too?) is the first extended play by South Korean boy band BTS. It was released on September 11, 2013 as the second album after 2 Cool 4 Skool. The album consists of ten tracks, with "N.O" as the lead single. The group later promoted "Attack On Bangtan ", another track from the album.

BTS, also known as the Bangtan Boys, is a South Korean boy band formed in 2010. The band consists of Jin, Suga, J-Hope, RM, Jimin, V, and Jungkook, who co-write or co-produce much of their material. Originally a hip hop group, they expanded their musical style to incorporate a wide range of genres, while their lyrics have focused on subjects including mental health, the troubles of school-age youth and coming of age, loss, the journey towards self-love, individualism, and the consequences of fame and recognition. Their discography and adjacent work has also referenced literature, philosophy and psychology, and includes an alternate universe storyline.