3rd Line Butterfly are a South Korean band formed in 1999. Currently the band is made up of the lead members 남상아/Nam Sang-ah (vocals, guitar), 성기완/Sung Gi-wan (vocals, guitar) and 김남윤/Kim Nam-yoon (bass guitar). In 2000 they released their début album 'Self-Titled Obsession', while in 2002 they came to public attention when they were featured on the OST to the drama '네 멋대로 해라' ('Ruler of Your Own World').

Read more about 3호선 버터플라이 on Last.fm.