He from the old world wakes up in this world
Destiny chooses us to meet, and genes make us like each other.
Maybe this is fate
………………
The protagonist is set as an experimental product from the old world, and his doubts are similar to Mark's.
It can be regarded as the original fusion of human beings and Mana ecology.
The timeline of the story is a few years before the development of the plot of the spirit cage
Purpose: Happy life in the wasteland