Emotional depth added to IU ♥ Byun Woo-seok's romance… News of joining the OST

IU With you Byun Woo-seok As your romance deepens, Hanroro I heard that the emotional depth is expected to increase as you participate in the OST, haha.
With the addition of music, I think the changes in the two people's relationship will be conveyed even more immersively.
It feels like an important point has been added to complete the drama's atmosphere.