According to Koreaboo, when appearing on Jonathan's YouTube show "The K-Star Next Door", Kang Ha Neul once frankly shared about his relationship with actor Ji Chang Wook.
According to Kang Ha Neul, he and Ji Chang Wook worked together on the 2010 musical Thrill Me. In each performance, they kissed 2-3 times.
The thriller thrill Me was performed for 6 months in 2010, with 5 different male leads and 8 performances per week, each pair will perform at least once a week.
Therefore, throughout their time performing together, Kang Ha Neul and Ji Chang Wook have kissed countless times. Kang Ha Neul even admitted that Ji Chang Wook is the co-star he has kissed the most in his career.

"Thrill Me" is an award-winning musical based on the true story of a murder committed by "two crime families" Nathan Donald Donald and Richard Loeb in 1924.
Ji Chang Wook also mentioned kisses with Kang Ha Neul: "We kissed countless times. And those are not simple kisses. All were intense kisses, deep kisses.
The actor added that he kissed Kang Ha Neul in the musical Thrill Me more than he did in the kissing scenes with Park Min Young in the movie Healer.
In 2018, Ji Chang Wook and Kang Ha Neul reunited in the Korean Army musical "Shinheung Military Academy", when both were serving their military service.

In real life, the two actors still maintain a close relationship, but they have never collaborated in any film project.
Kang Ha Neul has the movie The First Ride starring Kim Young Kwang, Cha Eun Woo, Kang Young Seok and Han Sun Hwa, which is set to hit theaters on October 29.
Meanwhile, Ji Chang Wook is preparing to return to the small screen with a leading role in the Disney+ drama The Manipulated, co-starring with D.O. (EXO). The 12-episode film will be released from November 5.