Joo Won became a paparazzo spying on Um Tae Woong in still cuts released by drama '7th Grade Civil Servant' (formerly referred to as 'My Girlfriend Is an Agent')

The two actors are already known to be very close friends as they star in variety show '1 Night 2 Days', making this scene even more humorous as Joo Won secretly snapped photos of Um Tae Woong by hiding behind benches, cars, and hiding out on the streets.

Um Tae Woong plays the role of Choi Woo Hyuk, an industrial genius spy whose real name and face aren't clearly known. He will be avenging his family as Joo Won's enemy as the main antagonist. The pair have also filmed many previous works together, such as the movie 'Special Investigation Division'.

Joo Won said, "When I monitor Tae Woong hyung through the screen while he's filming, he exudes masculinity. I'm trying to learn charisma from him through this drama. He's someone I want to learn from both as a human and as an actor."