On Invincible Youth, Secret's Sunhwa is known to be very easy. She's called the "white paper girl" on the show because she doesn't or acts like she doesn't know much. It's implying that her brain is blank, like paper. That's the type of person Kim Jong Min is known to be. That is why when they met on the set of Invincible Youth, they just clicked! He came on as a one day guest member on the show, just like T-ara's Eunjung. The two got together as the "white paper couple" and made the other members crack up. They started to get a little too crazy with looking less intelligent during a quiz and Kim Jong Min said, "We can't do this." While planting potatoes with Kim Jong Min, Sunhwa said, "Let's just do potato farming together." I guess she connected with him. The episode airs on the 30th. They belong together.