Kim Se-jeong (김세정; born August 28, 1996), better known by the mononym Sejeong (세정), is a South Korean singer signed under Jellyfish Entertainment. She is best known for finishing second in Mnet's K-pop girl group survival show Produce 101 and was a former member of I.O.I, gugudan and its subgroup gugudan SEMINA. She debuted as a soloist on November 22, 2016 with the song "꽃길". This song was produced by ZICO on the Talents for Sale variety show as part of a 30 minute mission.