Hi my chingu, I have to register for our spartace topic. I have more confident for our Spartace ship.
As your guys might remember in Big Brother show HaHa has said to Ji hyo that "I love you" which Jong Kook disagreed and said that HaHa should not say that event though HaHa considers Ji Hyo as his sister. It means that Jong Kook is not person who can say Yeobo just for fun or just because he is too closed with Ji Hyo. And you can easily see in ep 441 when YJS called Jong Kook "flirt namcha", Jong Kook did not happy with that and did not agree. He is not a joking person and I never see any flirt scene from Jong Kook to female guest. He is a gentleman, kind and shy. Hence, I strongly believe that it must be something between them.