On the July 19th broadcast of MBC Radio FM4U's 'Kim Shin Young's Noon Song of Hope', Heechul revealed, "After the kiss scene, Shin Young and I no longer spoke formally to each other. We've known each other 11 years. We got friendly while filming 'Rainbow Romance' in 2005, but after the kiss scene, we speak informally now."
He continued, "She asked me if I was okay in the waiting room and said we should speak informally to each other. It was a really beneficial moment. And you all already know, but Shin Young has great skin. It's baby skin. My heart was beating fast. My heart beat fast watching the episode too."