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little sketch
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 in work of releasing other hits by CORTIS; FASHioN , Lullaby , Joyride and upcoming GOAT movie official soundtrack , Mention Me.
==Background info==