Autumn in My Heart (2000)

There were two girls who were born in October. They had same birthday and were raised in the same village and in the same class. One led a happy life with loving parents and a brother. Her name was Eun-suh . However, the other was raised by a single parent and was living in poverty. Her name was Shin-ae. One day Eun-suh has a car accident and by a blood test it is found that Eun-suh and Shin-ae was swapped at birth. Girls were returned to their original places. Eun-suh's brother Jun-suh is especially confused and saddened by this. Some years later, Eun-suh and Shin-ae bump into each other at hotel. Eun-suh is a poor worker and Shin-ae is a hotel manager. Meanwhile, Jun-suh has become an artist and has a fiancee. One day he's introduced to his friend's girlfriend and she was his long lost sister, Eun-suh. Now all the relationships start to twist around and Eun-suh and Jun-suh's sad love begins

Is Autumn in My Heart on Netflix? Unfortunately this serie is not yet available on Netflix.