Park Min Kyun, known mononymously as Minkyun and formerly as MK, is a South Korean singer, dancer and member of ONF (온앤오프; short for ON N' OFF). He graduated from Korea Arts High School and was enrolled in the Entertainment program at International Cyber University but is currently on a leave-of-absence. Before debuting, he was a trainee at Starship Entertainment for several years. After switching companies, he was introduced as part of WM Boys with their first appearance as B1A4's backup dancers at the 2016 Dream Concert in Seoul. He gave a performance at IDOLCON just a few months before debuting with all his group mates. After seven years as a trainee, he made his official debut in August 2017 as the group's ON Team member, lead vocalist and sub-rapper with their 1st EP "ON/OFF." In 2018, the group signed a contract with Victor Entertainment (ビクターエンタテインメント) and made their Japanese debut and held a concert in Tokyo. In 2020, he made his acting debut with a role in the web drama "Can I Step In?." In 2021, all members (except U) decided to enlist for their mandatory military service around the same time, so he enlisted on December 21 and was discharged on June 20, 2023. After being released, the group is now active again and is represented by WM Entertainment (WM엔터테인먼트).