Oh Soo (Jo In Sung) finally found out the answer to the riddle that Oh Young (Song Hye Kyo) told him.

During the 4th episode of SBS Wednesday and Thursday drama "That WInter, The Wind Blows" that aired on February 20th, Oh Soo figured that Oh Soo (her real brother) bought Oh Young cotton candy in order to cheer her up and stop her from crying.

On this episode, Oh Soo gave Oh Young cotton candy. Oh Soo said, "the place that was open during our childhood was closed, so I suffered a bit." Oh Young said, "I thought it was such a small detail that it would have been ok if you didn't remember. You always went to that little store with mom. I thought of you opening that door and buying me a cotton candy."

Oh Young said, "I wanted to receive a compliment when mom came. Because mom told me not to eat it. We lied that we wouldn't eat it. Mom would follow us around and take pictures of us."

They both shared the same cotton candy and enjoy the sweet flavor. Oh Soo's expression changed as he looked at Oh Young. He was pretending to be her brother in order to gain money from it, but as he became closer to her, his feelings towards her began to change.