You Hee-yeol's Sketchbook Season 1 Episode 599 Episode 599 ( Air Date 2022-07-15 ) Genre Talk category. Overview "You Hee-yeol's Sketchbook is a Korean pop music program that is both a talk show and live music show. The host of this program is You Hee-yeol, also known as Toy, a one-man project band. This program has aired since April 24, 2009.".