On the run with a witch from another world

It’s been 82 years since the combined armies of the world defeated the incarnation of the devil and drove out the witches that helped its rise to power. The world is a scarred but peaceful place now.
Oliver is an unremarkable young man who lives a boring life in a small village, until one day a witch named Arata Chiyo appears from another world! Oliver protects her from persecution and they are quickly forced to flee. What kind of feelings will bloom between these two on the run as they face mounting odds?

[Isekai - High Fantasy]