Kim In‑seong, born July 12 1993 in Seoul, is a South Korean pop singer and actor who debuted as the main vocalist of SF9 under FNC Entertainment on October 5 2016. After rigorous training and a brief appearance on the 2016 miniseries Click Your Heart, he rose to prominence with the group’s first single "Fanfare" (2016) and subsequent releases, including the 2018 hit "Fanfare (Remix)". In 2022 he expanded his solo repertoire with the Watcha Original EPs Crown ‘Must Have Love’ and Conceptual – Sporty ‘Energetic’, while contributing to original soundtracks such as IDOL I Pt. 3 (2025) and The Chairman is level 9. His performances earned top‑10 placements on the Gaon Digital Chart, and his 2023 OST The Matchmakers Part 3 received critical acclaim for its melodic depth. The track "To You" on the soundtrack for the musical Even if this love disappears from the world tonight, released on June 4, 2025, entered Melon's Top 500 Melon domestic chart at rank 240, 10 days later.
