A relatively strong female character is relentlessly subjected to acts of cruelty that break both her body and her mind but then she forgets everything and becomes restored to her previous healthy state.
Does that remind you of any previous work of art? — I feel being reminded of “Westworld”.
It's so fitting for this manga to be translated by “Eresh Scans” because its plot somewhat mirrors the relationship of Ereshkigal and Ishtar in “Fate” series.
And for a good reason: this lack of any leading is designed to tell us that this story is not a post apocalypse story, there wasn't any ancient advanced civilization (on our own level with electricity and moving walkways and so on) that fell apart thousands of years ago.
(I won't elaborate any...