Black Eyed Pilseung
Black Eyed Pilseung were a South Korean music production and songwriting duo made up of Rado and Choi Kyu-sung, formed in 2014. They produced hit K-pop songs such as Sistar's "Touch My Body"; Miss A's "Only You"; Twice's "Like Ooh-Ahh", "Cheer Up", "TT", "Likey", and "Fancy"; and Apink's "I'm So Sick", "Eung Eung", and "Dumhdurum".
Before the duo's formation, both members often collaborated with Shinsadong Tiger. Rado worked on hit songs such as 4Minute's "Volume Up", Apink's "My My" and "Hush", and Trouble Maker's "Trouble Maker" and "Now", while Choi Kyu-sung was involved in T-ara's "Roly-Poly", Hyuna's "Bubble Pop", and Beast's "Fiction".
In August 2017, the duo joined forces with CJ E&M to launch a new entertainment company called High Up Entertainment, which became an independent company in 2018. In February 2019, the duo debuted their first boy duo 415. In November 2020, the duo debuted their first girl group STAYC. In March 2025, Rado and Choi Kyu-sung parted ways due to differing musical styles, with Choi leaving High Up Entertainment.