Just lovely~
The expression is charming and the background doesn't distract me from the main subject. The details in the outfit are simple and cute, but what I really love is the use of colour here, how they all tie together nicely (which I know is quite difficult for some artists) and stay constent with the mood.
My only suggestion is that the line work could be a littler cleaner and there are miner spaces here and there that need to be coloured, but it's really nothing major,