South Korean singer, songwriter, and guitarist. He is known as the one of the Top 6 finalists of Mnet's Superstar K4. On April 2, the singer released the music video to "2 Years Apart," the title track of his first mini album, The Manual. He released The Manual on April 11, 2014. On 21 January 2015, he released his second fully self-composed mini album entitled Sing Sing Sing. He is currently signed to Mystic89. He was featured in BoA's 8th album Kiss My Lips.