Real name: 유희열

Effective period / Period of releases: 1994

In 1994 You Hee-yeol(Hangeul: 유희열) started the band Toy(Hangeul: 토이) as a duo with Yoon Jeong-oh(Hangeul: 윤정오). But after releasing Toy's first album, Yoon Jeong-oh left the band. Since 1996, Toy became a one-man band with You Hee-yeol as the sole member. From then on, You rarely sings the songs in his albums and instead, invites guest vocalists such as Kim Yeon-woo, Kim Hyung-Joong, Lee Jang-woo, Yoon Jong-shin, Kim Jang-hoon, Jinu and Byeon Jae-won.