Lin Asahi University studied philosophy, but it was not satisfactory after graduation, because her father had his first love as a mathematical genius, which made her feel mediocre, so she lost confidence in mathematics, so she changed to philosophy in university.

In an accident, my father got Alzheimer's disease. When Lin went home to get the money, she got a photo from parallel time and space. Coincidentally, she erased the formula written by her father on the wall, so she and Yoshioka came to their primary school.

After all kinds of reasoning, Lin decided that this is parallel time and space, and the way to return to the real world is to take another photo. In order to take the same photo, Lin Zhaori and Yoshioka participated in the training camp, and through wits and wits, they finally succeeded in staying in the training camp and took the same photo. She and Yoshioka also returned to the real world.

During the training camp, Lin regained his love for mathematics and finally decided to be admitted to the graduate school of Sanwei University. However, because Lin Zhaori is an interdisciplinary exam, she has no mathematical foundation for so many years, and the training institutions don't rate her highly.

At this time, her first love, Pei Zhi, appeared with a recording pen of parallel time and space, and became suspicious of her father's stillbirth, so she learned about the existence of parallel time and space through Lin Zhaori and decided to go and find out. The recording pen of parallel time and space, plus the formula of rubbing the wall, is the tunnel leading to parallel time and space. Lin He came to parallel time and space.

In parallel time and space, Lin Zhaori, who was in high school, fell behind in mathematics because of his limited talent, so he gave up on himself and began to learn nothing. In the real world, the arrival of Lin Asahi began to change this situation. In the process, she frantically supplemented the foundation of mathematics.

In parallel time and space, Lin began to avoid his father's car accident. It was under her intervention that Lao Lin was not hit, and Pei's father appeared in the recorder because Lin changed parallel time and space.

By returning to parallel time and space for the second time, Lin Zhaori not only had a mathematical foundation, but also calculated the year of Lao Lin, so they returned to the real world and began to verify Lao Lin's equation. Finally, they succeeded and made contributions to the mathematics field, and she and Pei Zhi came together again.