As the storyline goes further in, the personalities of each character are becoming more and more defined.

The episode of "Level 7 Civil Servant" that aired March 6 featured the multi-personality of the character Do Ha, played by actor Hwang Chang Suk, becoming more distinct. In front of Seo Won (Choi Kang Hee), he is a completely harmless sweetheart. To Sun Mi (Kim Min Seo) however, he is a completely heartless bad boy.

In the drama, Do Ha and Seo Won pretend to be a couple for a mission and stay overnight in the same room together. Do Ha is aware of how Seo Won feels about Kil Ro (Joo Won) and says, "Don't fake your smiles if its hard. It's really obvious that you're hurting because of Kil Ro. I thought I would feel better if you smiled. But it doesn't make me feel any better." It was Do Ha's way of expression his love for Seo Won. He was trying to be strong about his broken heart.

On the contrary, Do Ha was a completely different person to Sun Mi. When Sun Mi asks about whether he still cares for Seo Won, he answers, "I don't have any feelings for her. We're just co-workers." He had hugged Sun Mi before, confusing her tremendously. He is being a complete bad boy for Sun Mi who was longing for him dearly.

How will these love lines play out? Only time will tell.