The three entered Myongji College (Korean: 명지전문대학) in 1992 and continued exchanges while working as an underground rock band.
After completing the album, at the suggestion of the agency's president, they changed their debut song to one in which a female vocalist also participated.
In the summer of 1994, Hwang Hye-young's bobbed-hair wigs, bright stage costumes, and the knapsacks she carried on her shoulders were popular among South Korean girls.
Two Two disbanded when leader Oh Ji-hoon served as a Public Service personnel(Korean: 공익근무요원, 公益勤務要員) in 1995 and Yoo Hyun-jae joined the army recruit training center on December 26, 1994.
In addition, guest singer Hwang Hye-young moved to another agency in January 1995 because her contract expired on December 31, 1994.
[6] The title song of the second album 《TWO TWO 2》, female singer parts of 'Unfaithful Woman (Korean: 바람난 여자)' and 'One and a half(English version)' were recorded in Lee Yoon-jung's voice.
As Kim Ji-hoon worked as a Public Service personnel(Korean: 공익근무요원, 公益勤務要員) since January 1996, Two Two disbanded again.