I cannot understand all the bad reviews for this show. Its just a fun show that never takes itself seriously with the possible exception of the bad guy. If you start with the framework that everybody in the show is crazy then you will undoubtedly enjoy it. I laughed all the way through Namson's naivety and cluelessness. The lack of logic in her heroic deeds was just part of the weirdness.
Her beautiful mother, Guem Joo, was equally as reckless and crazy with her "save the world" obsession. Most of the other characters were no less quirky, especially the totally dysfunctional family.
Anyway, I watch a lot of K-Dramas and the characters in this one were some of my all time favorites.