The story of the growth of twin sisters. The elder sister has a high IQ and participates in various scientific research projects. The younger sister likes to be clever, but her high IQ has never been used in a proper way. In the eyes of the elder sister, the younger sister is a little public servant who needs to be pampered. In the younger sister's heart, the younger sister is the one who loves her the most. As a result, one day the elder sister sent the younger sister to a scientific research base, and the younger sister was reborn. The story begins from here, and the two sisters began a different life...