The song name is 「그대도 나와 같다면(If you feel the same too)」. It is a romantic ballad.
The full audio will be release official on Apr.3 (Tuesday).
This is the M/V preview cum song preview of this theme song for the drama.
Video copyright: tvN Drama
Video upload: CJENMDRAMA, Youtube (http://youtube.com/CJENMDRAMA/)
Video URL Link: http://www.youtube.com/watch?v=PzRJXo2ukGQ/