Yoo Jae Suk and HaHa evoked some giggles by way of poking fun at guest Hong Jin Young and her 'love line' with Kim Jong Kook. 

On the latest May 15 episode of 'Running Man,' HaHa exposed Hong Jin Young, telling everyone, "Jin Young called Kim Jong Kook in the morning while she was drunk. But Kim Jong Kook didn't pick up," resulting in much chagrin on Hong Jin Young's end. 

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Yoo Jae Suk chimed in, "Hong Jin Young tried to find out Kim Jong Kook's number first," making everyone burst out into laughter. An embarrassed Hong Jin Young vehemently denied the accusations, protesting, "I never did!" 

Sounds like somebody's more than just interested in Kim Jong Kook!