“Filing for love” (Vietnamese title: Thanh tra bí mật) is a romantic comedy set in an office, telling the story of Noh Ki Jun (Gong Myung) - who used to be a leading expert in the audit team of a large corporation but was demoted to handle internal violations, and Joo In Ah (Shin Hye Sun) - a tough, eccentric audit team leader who is hiding a secret.
Suddenly one day, Noh Ki Jun receives an anonymous tip that Joo In Ah is having an indecent relationship at work. He decides to investigate her secrets to retaliate, but is gradually attracted to her.
During that process, Ki Jun witnesses In Ah fighting with the human resources manager to protect a member in the department, making him impressed.
At the end of episode 3, Ki Jun also discovers the shocking secret of the female boss. A sharp, perfectionist, strict and almost untouchable woman like Joo In Ah has a hobby of being a nude model.
Ki Jun accidentally "caught in the act" that In Ah was working as a nude model for evening art classes.

However, the film scene immediately became controversial. On the Korean online community, many viewers said that this situation was unrealistic and out of sync with the film's content.
Some comments pointed out that nude model drawing classes at art schools are managed very strictly. They often lock doors, cover windows, clear a whole floor and ensure careful security, so it is almost impossible for people to enter arbitrarily.
Some other viewers believe that the screenwriter and director deliberately added this scene just to create a "shocking" element, attracting viewers.
“Filing for love” aired on April 25 on tvN with an opening rating of 4.4%, then increased to 6.3% in episode 2. The film had a fairly favorable start and is predicted to continue to increase ratings thanks to unexpected details.
Speaking about the appeal of "Filing for love", the female lead Shin Hye Sun once shared: "I think the audience will find a new and interesting style in the topic of "office violations", which may be a bit unfamiliar.
Especially in episodes 1 and 2, I hope everyone will pay attention to how this unique premise is deployed, as well as how characters with different purposes collide and get confused with each other within the audit room".
The actress hopes "Filing for love" can become "a small joy in the happy moments of the audience".
Meanwhile, male lead Gong Myung confidently said: "From the first episode, the chemical reaction between Joo In Ah and Noh Ki Jun will be very worth watching.
To effectively show the charisma of the character Ki Jun - a guy who is always confident, cute and loved by everyone anywhere, and also a top trump card - the actor said he had careful preparation, paying attention to his dressing style, tone of voice and facial expressions.
Gong Myung emphasized: "Unlike other office romance comedies, the unique setting of "Filing for love" will create a unique attraction for the audience.