During an interview with producers, Ahn Jae Hyun recalled, "I first saw Goo Hye Sun when she was doing her first full reading of the drama 'Blood'. My eyes turned into hearts at first sight. I couldn't hide that I liked her."
As for their first kiss, he revealed, "She made the move on the first kiss. We kissed before she went into filming a scene where she had to kiss that day." Goo Hye Sun explained, "I didn't dislike that a handsome guy was staring at me. That's why I just kissed him first."