Maoyuu Maou Yuusha - Volume 2 Chapter 9, “The Great Demon Conference, the Kurultai”

“Darling, I want…”“Here’s the credit card. Buy everything you want.”“Darling, I want to give you a child!”“That’s unnecessary.”“…”Ye Shengge’s inborn birthmark could only be deciphered by Ji Shiting.However, that man was very aloof and reserved, and he wasn’t tempted at all. And one day when she finally gave up and tried to leave, that man literally carried her back.She yelled, ” What do you want?”The man said with his deep voice, “What you’ve been wanting the whole time.Ye Shengge always thought that Ji Shiting was forced to marry her, yet years after, she realized that it was all part of his plan, and there was no way she could run away from him.

Rotten! Rotten! Rotten!
Yin Li was fired by the company and dumped by her boyfriend. When she woke up, she found that she had traveled to the orc world. He thought that with the brains of modern urbanites, he could make a fortune, but he found that courtship alone was enough to stumped him.
The blond lion orc likes bamboo horses, and the black-haired and yellow-skinned black bear orc has long been engaged… Looking left and right, only the hyena orc who looks exactly like his ex-boyfriend sends a “signal” of love to him.
However, it is rare to come to another world, but also to eat grass? Yin Li said: “Ugly refused!”

- Description from novelbuddy

This is an Isekai styled story, written from the point of view of the protagonist.

Discover the secret of the new, unknown world with Peter, as he sets his first steps in an empty, ruined city. Meet new people from all around the globe. Fight, laugh, and cry.

Year 2022, December the 1st. This was the day it all began.

Labyrinths had started forming all around the world, hundreds and thousands of people lost their lives as casualties.

Mutations followed after, occurring amongst the people, they began awakening super powers, the same for animals.

However these mutations brought along a virus. It quickly spread amongst the dead as they began to rise. Humanity had begun its fall.

Gray who had given up all hopes of living life, was granted a system with a special ability. On the very same day, of the outbreak, he was consumed by a labyrinth.

By the time he had gotten out, a week had passed. It was hell all around. A virus had broken out from the mutations, the dead were walking and spreading this virus.

However this was only the beginning.

Over time the mutations began to evolve and people learnt that the through the cultivation of their powers, they could improve their abilities.