In the book, the princess of the fallen country saved the country by eating melons

Mo Sheng, Mo Sheng. The only miserable female supporting character in a sweet pet story, who was not expected since birth. A complete tool. She learned the truth after binding a melon-eating system that collects and saves the souls of miserable female supporting characters. She decisively quit, and found that she had traveled through the book. She was also a princess of a fallen country in the book. She could only live for six years, so she just wanted to eat melons and make a mess. Seeing that the time of the country's fall was getting closer and closer. The plot went more and more off-track, the heroine died, and the hero did not rebel. It was getting more and more prosperous. There was no sign of her country being destroyed. She was also going further and further on the road of being loved by the group. But where is the golden finger? This little system can only eat melons and collect...