This may not be a pure time-travel story. There is fatalism and Taoist philosophy involved in time-travel.
When we fall into the mortal world, everyone we meet may not have met us, and we will miss it if we cross paths; maybe we should meet each other, and we can look back after we miss it. Between you and me, whether it is accident or fate. There is no need to be surprised or confused, everything is the way of heaven.
Conception: