Toy (Korean: 토이; RR: Toyi) is a one-man project band of Korean pop singer-songwriter and pianist You Hee-yeol.Toy started as a duo of You Hee-yeol and Yoon Jeong-oh, and was named after their two initials 'Y', as in Two + Y = Toy.However, after releasing Toy's debut album, Yoon Jeong-oh left the band to study overseas and You Hee-yeol joined the navy for his mandatory military service. You Hee-yeol has been the sole member of Toy since 1996.

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