[Lyrics Video] BOL4(볼빨간사춘기) - Butterfly Effect(나비효과) BOL4's Single Album [Butterfly Effect] Now Available on : ▶Bugs : http://music.bugs.co.kr/album/4066507 #BOL4 #볼빨간사춘기 #나비효과 SUPER SOUND, BUGS! http://www.bugs.co.kr