Sim Gyu-seon (์ฌ๊ท์ ), formerly known as Lucia (๋ฃจ์์) is a South Korean indie pop singer-songwriter under GYU (ํค์๋ฆด ๊ท). She used to be signed to Pastel Music (ํ์คํ ๋ฎค์ง) from her debut in 2010 to the end of 2016. Since her departure from the label, she goes by her real name. She debuted in 2010 with the song "๊ณ ์์ด ์์ธ " (Cat Waltz) in the single "์ฒซ๋ฒ์งธ, ๋ฐฉ" (The First Room). Read more on Last.fm