君の瞳に恋してる
Sung made her acting debut in "Salut D'Amour", and continued to appear in TV dramas such as "See and See Again" (also known as "Can't Take My Eyes Off You"), "Should My Tears Show", "Hur Jun", "One Day Suddenly", "Bad Woman, Good Woman", "Yi San", and "Flames of Desire". She also released an EP in 2004 titled "Turn It Up" under the name A.One.