Xu Xu and her senior were hit and killed by a speeding truck driver on the way out of school. They accidentally traveled to the future. Human beings in the future are divided into three types of ABOs. Both of them happen to be O's. They also happened to find someone they liked in school, but the person Xu Xu liked only regarded her as a shadow of her ex. "When she comes back, you should give up." The person Xu Xu loved deeply hurt her time and time again, and finally chose to jump off the building to end his life.
Motto: Life is short, so be bold and speak out