Cursed: A living Doll

A wronged witch takes the daughter of the man who wronged her and cursed her to live as a doll. Then the Witch takes the living doll and sells it to a doll shop in South Korea. She tells the shop owner that the doll has a mechanicalism that makes her grow in realistic time. Intrigued the man buys the doll and keeps it for two years and sees it grow impressed he then takes the doll and sells it to a rich man for his six year old daughter.
Now eight year old Anna-Marie the living doll has a new home. She is still learning the rules.
1.) She can move normally but not while she is watched.
2.) She won't die from not eating but still can eat but only when she is not being watched.
3.) She can still talk but usually when others are asleep or not around. (Except in the beginning when Jae-Hee believed that she heard her talk. She stopped believing when she got older.
4.) There is a way for the curse to break but she needs Tae-Hee the Oppa to Jae-Hee to believe in her first.
5.) Etc..
Anna-Marie finds that she likes Tae-Hee more and more as she gets older. So how will she get Dong-Sung to believe that she is alive without breaking the rules or scaring him to death?