In a novel where the female lead had a split personality, the female lead was very good at playing the piano. She had two personalities, and after her split personality, it was her sister. This novel seems to have two words

The name of this novel might be " The Witch of the piano." This was a novel about the piano skills of the female lead. She had two personalities, one was a normal female character, and the other was a patient with split personality, who was later thought to be her sister. The word "witch" in the title of the novel may imply that the heroine had extraordinary piano skills.