During the breakup scene in episode 11, In Ha tells Dal Po he must pursue his revenge without worrying about her. I liked the song that played in the background, “Only One Person” by K.Will, released 2014-Dec-18. This is Part 5 of the Pinocchio OST. Previously, I enjoyed K.Will on the King 2 Hearts OST when he sang “Love is Crying” (link to youtube video)
Youtube video with scenes from Episodes 1-12 via link or embedded below.