Just finished this on Netflix and so enjoyed it.
A very quirky, darkly amusing, slightly surreal crime caper. I also fell for Santa (Baek Sung-chul).
Lee Young-ae is perfect in the lead. A favourite mature actress, Kim Hae-sook, was great in a role the likes of which I'd not seen her play before; and I loved seeing Lee Hong-nae again, who was so good in The Uncanny Counter.
'K' is very vulnerable at times and it's often hard not to like her, until she starts to lose her purpose.
Totally felt for Lee Hong-nae's character at one point, although I wondered how much he was beholding to 'K' and how much it was for kicks.
A drama that is barkingly good fun at times.
The OST is a favourite now (and there are several Playlists of it on Spotify).