"O"-Jung.Ban.Hap.

"O"-Jung.Ban.Hap.
Version A and B cover
Studio album by TVXQ
Released	September 29, 2006 (2006-09-29)
Recorded	2006
Studio	SM Digital Recording Studio (Seoul)
Genre	K-pop R&B dance-pop
Length	43:50
Language	Korean
Label	SM
TVXQ chronology
Heart, Mind and Soul (2006) "O"-Jung.Ban.Hap. (2006) Five in the Black (2007)
Alternative cover
Version C and D cover
Singles from "O"-Jung.Ban.Hap.
"'O'-Jung.Ban.Hap." Released: September 29, 2006 "Balloons" Released: September 29, 2006

"O"-Jung.Ban.Hap. (stylized as "O"-正.反.合.), sometimes referred to as "O"-Union or just O, is the third Korean studio album (fourth overall) by South Korean boy group TVXQ, released through SM Entertainment on September 29, 2006. In a year when Korean music sales had slumped, it was the highest selling album in South Korea in 2006 and won the group several prominent awards in South Korea.^[1] The album stayed charted within the top 50 throughout 2007, and sold over 480,000 copies in South Korea by 2022.

The album's name "O"-Jung.Ban.Hap, literally translated to "O"-Justice.Opposition.Solution, is based on Georg Wilhelm Friedrich Hegel's theory of thesis, antithesis, synthesis. The album's lead single of the same name has lyrics that regard global conflicts with a plea for peace and resistance. The album contains a balance of fast tempo songs and ballads.