이승환의 데뷔 앨범 'B·C 603' 발매 20 주년을 기념하여 제작된 디지털 싱글입니다.
Tracklist
1. 심장병
Outsider - Come Outside (2004)
Outsider - Speed Star (2006)
Outsider - Soliloquist (2007)
Outsider - Maestro (2009)
Outsider - 주변인 : The Outsider (2010)
Outsider - 주인공 (2010)
Outsider - 슬피 우는 새 (2013)
Outsider - Rebirth Outsider (2013)
Outsider - Pride & Prejudice (2015)
Outsider - Pride & Prejudice Repackage (2016)
MC Sniper - So Sniper... (2002)
MC Sniper - Special Limited Edition (2002)
MC Sniper - 초행 (2003)
MC Sniper - Gloomy Sunday (2003)
MC Sniper - Be In Deep Grief (2004)
MC Sniper - How Bad Do U Want It? (2007)
MC Sniper - For You (2007)
MC Sniper - Museum (2009)
MC Sniper - 하쿠나마타타 (2010)
MC Sniper - 40 (2019)
MC Sniper & Illinit - 2010 Snipersound (2010)