He Lanqing used everything he had in exchange to let his system protect Yu Koning. Due to an accident, the system took Yu Koning back to her first year in junior high school.
Yu Koning has been living a smooth life since then, and has Chen Chen who loves her very much. However, Yu Koning finds that he cannot fall in love with anyone else no matter what.
Yu Koning chose to use a piece of the system to switch back to love and become an ordinary person.
In the end, Yu Koning devoted his life to scientific research, remained unmarried, had no children, and donated his property to the country after his death; Chen Chen married the well-matched Mo Yin and decided to forget this relationship as Yu Koning said.