As always, I'll write the pros and cons of this drama

Pros:
- South-north Korean theme is always interesting
- Rich of natural comedy (innocentness at its best)
- Shows the contrast between South and North Korean daily life and technology
- 2nd main roles show us more natural + realistic romance life, so you will be given 2 romance stories. Thus, the romance story will not be boring. (I love Seo Dan more than Seri anyway lol)
- Will always make you curious what will happen next

Cons:
- Romance scenes take some important plots
- It's more "romance drama" than "action drama" (Vagabond is still much better if you're looking for the action one)
- There are plot holes on episode 10 (why it's that easy to cross the border)
- Needs further research about how to do "people exchange" on the South-north border. (Isn't it supposed to be done at DMZ?)
- Not-that-necessary some support roles (Seri's hired gang/mafia).
- Love makes you dumb and can start the war, this ruins the end part of the drama. (How could Ri re-crossed the border in front of 2 countries' armed military just to hug Seri for the last time?)