The 2021 single "Won't Forget You" captured Kim Sung-kyu in a moment of transition, following his military service and signaling a new chapter in his solo career. The track showcases his signature emotive vocals.
- "Won't Forget You" was released on March 29, 2021, by Woollim Entertainment.
- The single marked Kim Sung-kyu's first musical release after completing his mandatory military service in South Korea.
- This single served as a pre-release track for his fourth EP, "Won't Forget You".
Kim Sung-kyu is a South Korean singer, best known as the leader and main vocalist of the popular K-pop group INFINITE. He has also had a successful solo career, showcasing a more mature and versatile musical style.
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