K-pop girl group member-turned-actress Sulli felt that the explicit sex scenes in the upcoming film “Real” were necessary to the story, she told reporters Monday.

“I don’t think it was easy. It was a huge challenge for me, acting-wise and in other areas. It was hard and I had a lot of concerns but it was fun,” said Sulli in a rare press interview at the press screening of “Real,” held at CGV Wangsimni.

Kim Soo-hyun (left) and Sulli attend the press screening of "Real" at CGV Wangsimni, Monday. (Yonhap)

Sulli attends the press screening of "Real" at CGV Wangsimni, Monday. (Yonhap)

Sulli attends the press screening of "Real" at CGV Wangsimni, Monday. (Yonhap)

The 23-year-old former f(x) member makes her big screen debut alongside actor Kim Soo-hyun in the film, and engages in several nude sex scenes with the actor.

“I think I have a lot of ambition when it comes to acting. It grew when I was shooting this film. I felt something like a sense of achievement while acting.

”I don‘t know that I’ve ever wanted to achieve something like this before. That is how eager I am about acting.“

Sulli attends the press screening of "Real" at CGV Wangsimni, Monday. (Yonhap)

Sulli attends the press screening of "Real" at CGV Wangsimni, Monday. (Yonhap)

On questions about her edgy social media posts, Sulli replied: ”That is a personal matter. I don‘t think I should talk about it right now.“

(doo@heraldcorp.com)