Jo Sung-woo, better known by his stage name Code Kunst, is a South Korean composer and music producer. In 2015, he released his second studio album Crumple and joined Highgrnd. In 2017, he released his third studio album Muggles' Mansion. In 2018, he signed to AOMG and appeared as a judge alongside Paloalto on Show Me the Money 777. He released his fourth studio album People in 2020 and won Producer of the Year at the Korean Hip-hop Awards in 2021. In 2023, he released his fifth studio album Remember Archive.

Lee Seong-hwa, better known by his stage name Gray, is a South Korean rapper and record producer. In 2012, he released his debut single "Blink". In 2021, he released his first studio album Grayground.