A pair of twin sisters. Their parents died when they were very young. The younger sister suffered from bone marrow cancer. The older sister insisted on taking care of her younger sister for 5 years. Five years later, she finally found a suitable bone marrow for her younger sister. However, the operation cost several million. The money was the biggest headache for her. However, the appearance of a man solved all the problems for her. Everything was the same for both of them, even the man she liked first...