River of Reincarnation

Whenever civilization develops to a certain level, a "tide" sweeping across the entire world will swallow up civilization. Natasha's story takes place in this post-civilization era. She was originally a body born from the "tide". She was adopted from a young age and given humanity by the family who accompanied her. In this era of industrial revolution started by electricity and internal combustion engine technology, she will witness the rapid changes in society, the changes in people's thoughts, witness the trend of history, and see the truth of civilization hidden in the river of reincarnation hanging in the sky.