Jang Geun-seok thought Yoo In-na was actress Kan Mi-youn from Baby Vox.
Jang Geun-seok was on the phone with Candy Girl Yoo In-na on the tvN show "Candy In My Ears". Jang Geun-seok was in Sky Way taking a walk and he told his Candy Girl, "I want to come here with my girlfriend. I want to come here with you".
He didn't know that the Candy Girl was actually Yoo In-na, so he started guessing things about her.
Then he heard her phone ring to Baby Vox's song and then he thought she was Kan Mi-youn.
Jang Geun-seok then said, "If this comes out on TV, I'm coming for you".