"The K2" lead casts Ji Chang Wook and Im YoonA made fans giggle with their recently concluded Korean bodyguard action romance drama. In fact, their chemistry raised rumors that the two make a great couple. Moreover, they are reportedly dating after being close for the tvN drama.

The chemistry of "The K2"'s lead cast was very evident all over its 16-episode series. Kim Je Ha (Ji Chang Wook) and Go An Na (Im YoonA) had a lot of sexy romantic scenes, which many viewers applauded.

Both stars recently shared details of their first kissing scene. According to them, they were not very close yet when the series had to be filmed. However, they just "rushed" their getting-to-know-each-other phase to get into the groove. This resulted to what many said was a "very believable" first kiss for Je Ha and An Na.

With this, some fans speculate that the two might be dating however, the two never confirmed it.

Im YoonA revealed the behind-the-scenes story of her kiss scene with Ji Chang Wook in "The K2."

"Ji Chang Wook is someone who is good at leading others...When we first met in Spain, we struggled in getting to know each other," the actress said.

"Our director said, 'Hurry and become friends since you guys have to shoot a kiss scene soon.' So we talked and got to know each other. Because we had the same goal in mind, after the scene, we became much closer," she added.

She complimented Ji Chang Wook, saying, "He helped me a lot to create "Anna" (Im YoonA's character in drama). Whatever acting I did, he would say, Do as you like. He helped with the detailed acting."

Ji Chang Wook also shared about his chemistry with his co-star Girls' Generation's YoonA.

"We talked a lot. The kiss scene that was aired near the end was actually filmed first when we were overseas for filming. We found out that we'd be filming that scene when we arrived at the Barcelona Airport," the actor said.

"They told us that we'd be filming a kiss scene in several days. There wasn't a completed script yet. The screenwriter just told us the situation. I was so startled so I told her (YoonA) that we should get to know each other fast," the 29-year-old actor added. "It was really pressuring. We had to get close because of the kiss scene. So we talked a lot about the drama and also shared about each other. We shared our perspectives, how we lived our lives, hobbies, and even nonsensical life philosophies, and we became close real fast."

After "The K2" Im YoonA is reportedly to be busy with Girls Generation shows this holiday season and some world tours. Meanwhile, Ji Chang Wook is expected to be busy with acting projects and TV endorsements. The actor is also starring in the highly-anticipated web drama series "First Kiss For The Seventh Time."