Kim Nam Gil's interaction with "A Man of Reason" co-star Park Yoo Na is going viral.

As the action drama officially hit theaters on August 15, cast members have been busy doing promotional activities.

However, a clip of Kim Nam Gil and the 25-year-old actress sparks buzz on social media after showcasing the "generation gap" between the two.

Kim Nam Gil Got Startled After Seeing Park Yoo Na Do the Cheek Heart Pose

While on their way for an appearance to promote the newly released movie "A Man of Reason," the veteran actor posed in front of the media along with Park Yoo Na.

Interestingly, the recently premiered film is Jung Woo Sung's directorial debut.

Besides being the director, he is also one of the lead stars, alongside "The Killing Vote" star Park Sung Woong and, of course, Kim Nam Gil.

On the other hand, other familiar faces who joined as supporting cast members are Park Yoo Na, Lee Elijah, and Kim Joon Han.

"A Man of Reason" depicts the story of Soo Hyuk, who was imprisoned for 10 years on behalf of his boss. As he was released from prison, he learned that his daughter got involved in the group that he used to work for.

Wanting to cut ties with the gang and live like a normal person after his prison life, he is being chased by his boss and using his daughter as a hostage.

The only way he could save his daughter was through violence.

IN CASE YOU MISSED: Kim Nam Gil & Kim Young Kwang To Possibly Lead Netflix 30 Billion Won Series 'Trigger'

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Written by Geca Wills