For me, Spartace couple is very believable as a real couple in the real world because of many incidents in Running Man and behind the screen.

The most obvious would be during the episode when so many idols came. When they were playing the island game thing, Yoo Jae Suk shouted 'Kook Jong-ah' probably to warn him that they were too obvious. They were hugging each other and staying close like glued together.

Then there was the helicopter ride when Shinhwa came as guests. In the helicopter, the Commander and Ace were holding hands although it was really unnecessary. And then, later the One Man was the only one worried that they might kidnap the Ace when she went to the Black Pearl. 

Then, during which Ji Hyo took a bite from the Commander's hot bread. You don't just do that with some stranger and the fact that she did eat it proved that they are very close with each other. The other hint was Jae Suk didn't say anything about Ji Hyo eating Jong Kook's bread and just turned away awkwardly.

Then, in more recent episode where Ji Hyo and Sik Yung was together, the Commander had looked pissed off (probably because the guest was touching his woman?). ^^kk

But then, it also occurs to me that they are just oppa-dongsaeng, colleagues-only relationship and it is just that they were THAT comfortable with each other (although I really hope to dear god that they are together).

Anyway, this couple is fun to watch and so thrilling probably beca