Yoo auditioned at several music agencies as a high school student.
After spending tens months in communication, he became a trainee under JYP Entertainment and was slated to debut in a group at the time.
He ultimately left the record company one year later citing "personal reasons".
He auditioned for TS Entertainment and was signed to the label soon after.

Yoo was revealed as a member of idol sextet B.A.P on January 18, 2012, where he served as the main vocalist.
The group debuted eight days later with its single album Warrior.
In November 2014, the group filed a lawsuit against its agency.
The members sought to nullify its contract with the company citing "unfair conditions and profit distribution".
In August of the following year, the two parties ultimately settled and B.A.P resumed its activities under TS Entertainment.
In August and December 2018, Yongguk and Zelo left the group and record label following the expiration of their contracts, respectively.
Yoo and the remaining three members left the agency in February 2019, leading the dissolution of B.A.P.
Yoo auditioned at several music agencies as a high school student. After spending tens months in communication, he became a trainee under JYP Entertainment and was slated to debut in a group at the time. He ultimately left the record company one year later citing "personal reasons". He auditioned for TS Entertainment and was signed to the label soon after.
Yoo was revealed as a member of idol sextet B.A.P on January 18, 2012, where he served as the main vocalist. The group debuted eight days later with its single album Warrior. In November 2014, the group filed a lawsuit against its agency. The members sought to nullify its contract with the company citing "unfair conditions and profit distribution". In August of the following year, the two parties ultimately settled and B.A.P resumed its activities under TS Entertainment. In August and December 2018, Yongguk and Zelo left the group and record label following the expiration of their contracts, respectively. Yoo and the remaining three members left the agency in February 2019, leading the dissolution of B.A.P.
Yoo Young-jae