I too began watching the drama as a fan of A Little Princess.
However, I was super disappointed in the execution of the story line as the producers were so EXTRA with the bullying. Some of it was so unrealistic and brutal. They were so horrible to her purely due to jealousy and spite.
The acting is what sort of makes it worth it.
There is a little bit of justice at the end but not enough to make up for the type of treatment she was given. The drama was very dramatic as most are, however, do not go into this with the expectation of it being a meaningful watch.

This was perfect for an in between drama though. 5/10.