Choi Ki Su, known by the mononym Kisu, started his career as a singer on June 12, 2012, with the release of "Rocking Girl", a single album by the group 4K, sub-unit of the boy group 24K, which debuted on September 6, 2012 (with the release of "Hurry Up"). On December 22, 2017, he released, under the stage name "Soo", his first solo album "Sweet Lie". Kisu has made his acting debut in December 2016, thanks to the release of the Chinese-Korean web drama "Love at the Tip of the Tongue". On November 8, 2018, he started his military service, which officially ended on June 19, 2020. On June 27, 2019 (Korean time), it was officially announced that he's no longer a member of 24K. On January 29, 2021, he released the single "BOY", the first one under his new stage name "KISU". (Source: Korean = Namu Wiki || Translation = MyDramaList) Watch drama online for free.