Li Ping'an, female, 18 years old. In modern times, people tend to be crazy. She was eventually treated as an imaginary love rival and rolled down the hillside at high speed in the shape of a ball.
After traveling through time, he went too far. Although he tried to be a good person with his tail between his legs, he was pushed by the world and couldn't help himself.
The only thing that hasn't changed is his strong belief in going home. It's a long road home. Please see how Li Ping'an searches for it.