The duo's OST will be called "An Impatient Confession". Starship Entertainment singer/song writer Brother Su is known for his smooth and charming voice, whereas Yoo Yeon Jung has a very clear and pure voice color to match. It will certainly be interesting to see how the whole song will sound like!
As the producer is the same individual who created IU's "Through the Night", the anticipation is very high. The synergy between talented singers and producers will be great to see. You can listen to their full OST on July 7 at 6PM KST!