Seirei Tsukai no Blade Dance - Volume 20, Chapter 3 - The Demon King’s Darkness Kagura

Winner of the 2017 Joara Novel of The Year Contest-

In a world plagued by Morgellons, a deadly disease that turns humans into non-human creatures, people have chosen to abandon their humanity in order to fight against the bloodthirsty corpses. In the end, there will be no humans left on Earth.

But that harsh world is, in fact, a world fabricated merely for entertainment. A world for humans to live in exists neither inside nor outside.

This is the story of a boy who, while living a miserable life, stares at the stars as he desperately tries to keep his humanity.

30 year old Lu Ziwen was born in poverty and after struggling for a lifetime, he is finally able to perform in the Golden Hall symbolizing the highest honor. However, an hour before taking the stage, he was killed by his lover.

Criminal Psychologist, Su Xiao Pei, who was an leftover woman in her modern life, was informed by the God Of Marriage, Yue Lao, that her destined lover was in a car accident, his soul was sent to another world. Su Xiao Pei was ordered to bring back this strange man who was connected to her by the red string of fate. Otherwise, she will live the rest of her life in loneliness, with no one to support her.
But how does that man look? No idea.
What’s his personality like? No idea.
What does he do for a living? No idea.
Can she not go? Of course not.
Su Xiaopei, who believes in all things logical has run up against a serious wall this time.
The bottom line: This is a story about a modern female psychologist who has traveled back in time and an adorable warrior as they talk about love and solve crimes.

- Description from Novelupdates