"Among the many new agents, the one and only agent recruited through special employment."

To live and die at one's own country.
An agent from the National Intelligence Service whose love is only meant for his country and not women.

He applied for NIS with the intention to serve his country and passed through with his background as a soldier from the special forces.

Despite the fact that he personally thinks he's the strongest agent out there, he's not given any special treatment by anybody at NIS thus hurting his pride.

Though he looks down on the other agents who doesn't even carry a strong patriotism and eager comradeship, Seowon (Choi Kang Hee's character) was different.
He somehow felt attached to her and felt like he should do something for her, as if he should protect her.

Source: http://www.imbc.com/...d/tv/drama/7th/
Translated by bbiyak25 @ Wild2Day.org