Lovely K-drama and excellent, charming actors. I've watched several Chae Soo-bin dramas and I loved especially I'm Not a Robot. When it comes to Yoo Yeon-seok, I haven't had the privilege of watch him act, but certainly I will do so in the future. He does a brilliant job. If you have the chance to listen OST "See The Light by Lim Hyunsik (BTOB), please do so! Absolutely gorgeous voice and lovely song.