So far, so good

Through episode 18 I don't really have any negatives. I'm glad they haven't broken up so far, but I have a feeling that they will just because that's the usual story line.
I appreciate the second office romance (almost?) but the one between the best friend and the driver/former-current boyfriend/ police officer in training just doesn't interest me.
I love the OST. I hope it will be available somewhere.