Changes

Seonghyeon is a South Korean singer , songwriter and songwriter producer under BigHit Music. He is a member of the boy group CORTIS.

On July 14, 2025, Seonghyeon was announced as a member of BigHit Music's upcoming boy group (later revealed as CORTIS). The group made their debut on August 18 with the digital single "What You Want".

He also sang the intro of the song titled "GO!" by CORTIS which is the pre-release song. In less than 5 months through the debut, he has been givibg big help contributing a lot in work of releasing other hits by CORTISCortis' music production; FASHioN , Lullaby , Joyride and upcoming GOAT movie official soundtrack , Mention Me.He's known for being an ACE — this young artist worked in 100+ tracks before debut , trained for more than 5 years under bighit.