Lee Mi Joo asked Kim Jong Min if he's flirting with her. 

On the January 27th episode of 'Hangout with Yoo', Lee Mi Joo, Kim Jong Min, and the rest of the crew headed over to a workshop. As they got into their seats in the van, Kim Jong Min suggested they both wear the same seat belt, and Lee Mi Joo expressed, "This guy is weird. He's telling me he wants to wear the same seat belt."

Kim Jong Min explained, "I only saw one seatbelt, so I asked if we should wear one together," and Yoo Jae Suk responded, "I'm sorry, but are you two on a honeymoon here?" 

Lee Mi Joo later told Kim Jong Min, "I'm really popular. It'll be hard for you to get me. You have to tell me if you have feelings for me." Kim Jong Min suddenly said, "I'm good at fishing," and Lee Mi Joo replied, "Are you flirting? I'm not curious, and you're suddenly saying you're good at fishing."

This isn't the first time Lee Mi Joo and Kim Jong Min had this kind of exchange as she previously revealed she thinks the Koyote member has a crush on her.