I Am A Matchmaker on Taobao - Chapter 37:

After the nuclear warfare, massacres started to spread throughout the entire world. The order between humans completely collapses, and the strong eats while the weak gets eaten becomes the #1 rule.

Only a pure maiden can have a privilege to make contract with a spirit.

In Areishia Acadamy, maidens from noble family were gathered there, giving them an elite education to become a spirit contractor. A boy Kamito, by accident he peeped on a girl, Clair, who was taking a bath, and he even made a contract with spirit that she wanted.

Kamito was actually an irregular male spirit contractor, which should not exist.

Let someone else go to war, you, lucky Austria, go get married! What the god of war can give you, the god of love can also give you.

The smoke of the Napoleonic Wars has dissipated, and the Vienna system that once brought peace to Europe is riddled with holes. Beneath the seemingly peaceful appearance, there is a vortex of the times with undercurrents, the tranquility before the storm.

The air is filled with the steaming mist of sweat, and the choking black smoke makes it hard to breathe. On the elegant dining table, a group of soldiers and fat men in suits are pushing each other, feasting on the feast called the world, hanging on the wall Van Gogh’s self-portrait with waltz in his ears.

Suddenly the music turned into a march, and the picture also turned to the battlefield. Soldiers marched in a neat line, walking towards the machine gun barbed wire.

A shell fell on the ground, and after the smoke passed, countless cavalry rushed to the artillery position.

Accompanied by a loud noise, a wooden plane flew close to the ground, then pulled up rapidly, broke through the clouds, and shone brightly.

- Description from novelbuddy

Chen Rui, an otaku from earth, is reborn into a human body in another world, who falls into the legendary evil, brutal world of the devil called Mozu where humans are treated as food. He has to survive while facing horrors of the devil, violent dragons and a variety of power enemies depending on a strange super system chip and his wits. Surrounded by Devil’s beauties such as black-bellied lolita princess, cold queens, violent dragons, charming poisonous devils …

Wanting to live in the Devil’s world is hard! Wanting to live in the Devil’s world as a human is harder! Wanting a human to be the devil’s son-in-law is hardest!

Let us see how a small otaku uses power and strategy step by step starting from an ordinary human to writing a legend as the devil’s greatest son-in-law.

- Description from Novelupdates