[Genius Mathematics Girl × Tough and Protective Sister]
The younger sister Wu Yan, who was rescued by Zhuang Xueyuan from the river and had a big chest, was both a disaster star and a genius. Later, people from country Z picked her up and said she was a national treasure!
Wu Yan can calculate everything in the world, but he can't calculate his sister's sincerity.
When she was recruited by the country, her sister had all her memory wiped.
Until that day, the system showed that my sister was "living peacefully"——
But she saw lies in the eyes of others.
