The female lead's first life was Zhang, and her cousin was reborn. She traveled back to her childhood and went to university. The more common setting was to travel to a different world, and the female protagonist of this world became her cousin in this time and space. The female protagonist would experience a series of growth and adventures in this time and space, and in the process, she would learn some secrets and history of this time and space. The female protagonist would learn knowledge in university and encounter many different characters and plots, including some other characters who had traveled through this time and space.