Park Yoo Chun revealed that he has a good friendship with actor Oh Jung Sae.

During an interview with a media company in Japan, Park Yoo Chun said, "I have a really good chemistry with senior Oh Jung Sae. I like him so much that I smile when I see him. We understand each other. I have the most NGs with him, because we laugh too much. It's fun acting with him. He's great at acting, but he also has a good personality. I have a lot to learn from him. He takes good care of me, and it's fun filming with him. When we talk about personal things, it's to the point where I call him wife."

Oh Jung Sae also said during an interview, "he's seems like a friend I had for a long time, and an actor who is like a younger brother. It feels like I knew him for 10 years. There's no difference of when we are on camera and off it. He's good at acting, humble, and well mannered."

The 18th episode of "I Miss You" is to air on Wednesday on MBC at 9:55 PM (KST).