Akdong Musician - I Love You (All About My Romance OST)
I love this song it's so cute.
The two definitely deserve their National Brother and Sister title - the song claimed #1 just 2 hours after its release, beating big names like Cho Yong Pil and Psy!
Lemme know what you think? They need more international attention - I will probably post up more pieces of this sister-brother duo ^^