KBS 2TV's "Once Again" stars dished on their hit drama in the recent episode of the program "Ask Us Anything."

"Once Again" stars Oh Yoon Ah, Lee Cho Hee, Ki Do Hoon, and Lee Sang Yi appeared together in a broadcast of the JTBC variety show where they discussed their experiences and the chemistry in filming the popular drama.

The fan-favorite couple Song Da Hee and Yoo Jae Suk in "Once Again," played by Lee Cho Hee and Lee Sang Yi, mentioned that they got along spectacularly during filming during the episode.

Besides, their real-life clothing tastes and styles are quite similar that they even accidentally sported "couple looks" many times, causing a stir among viewers of the drama. Kang Ho Dong also asked them whether they ever thought about real-life dating, but the two immediately shut down the possibility.

Lee Sang Yi explained that it was just for their work, and Lee Cho Hee always made it clear during filming. The four stars also tackled some of the drama's romantic scenes, which caused the most buzz among viewers.

Oh Yoon Ah mentioned that her 15 year age gap with on-screen love interest Ki Do Hoon had been stressful during filming and brought up a romantic scene that went viral for all the wrong reasons. She also commented that there were a lot of scenes that they embraced or held hands.

But it was Ki Do Hoon's first time filming those kinds of romance drama scenes. She added that a set wherein Ki Do Hoon romantically embraced her from behind came out to be like he had her in a chokehold.

After viewing the scene's footage, Super Junior's Kim Heechul kiddingly said about their set that it looks like a scene from a thriller movie, and adding a thriller background music would look like a kidnapping scenario.

Another question raised if there is any of Lee Sang Yi and Lee Cho Hee's romantic scenes stirred viewers. Lee Sang Yi replied that one set received huge responses because of their "hand chemistry."

The scene where Lee Sang Yi asked Lee Cho Hee to pretend to be his girlfriend for a blind date that he did not want to go on, but she held his hand that went viral because of the big difference of their hand sizes.