The Incubus System - Chapter 707: Lightglen’s Crack

Ye Qingli is the daughter of an Imperial Businessman’s first wife, wealthy and overbearing. But because of her mother’s early funeral, she suffered utter oppression and abuse under the hands of her stepmother. On the eve of her marriage, she died tragically in the hands of her stepsister and her own fiance!

The end of the world is coming, the world has undergone great changes, and everything has changed. Plants, animals, and even insects, as long as there are living things, have mutated.
Become more powerful, and even evolved supernatural abilities, such as chickens and ducks that can fly to the sky, such as cats and dogs that can breathe fire.
But only humans, without any obvious changes, seem to have fallen from the top of the food chain to the bottom of the food chain overnight.
Any creature that can open its mouth to eat can treat humans as food.
But fortunately, this world has not completely killed humans. Gradually, humans discovered that they had the ability to cultivate compatibility with other creatures.
As long as it has a high degree of compatibility with some powerful mutant creatures, it can be used for its own use to achieve the purpose of protecting itself.
Fang He is a person who is very compatible with mutant animals, but it is also because of his ability that he has changed from the strongest to the stupidest.
Fang He, who was reborn, said, “Hmph, this time…”

- Description from novelbuddy

A man was transported to Ancient China and eventually became a servant of a declining household without a male heir. He utilized his wits and modern knowledge to help the household and eventually become trapped in the sea of political turmoils of the period.

- Description from Novelupdates

A low-level civil servant. An F-class hunter. Yoon Seora thought that’s how she would live for the rest of her life.Until one day she was thrown into a dungeon alone.“System, you f*cking son of a b*tch!”The moment death was right around the corner, everything was turned upside down by her cry that burst out unconsciously.[Checking information about ‘Yoon Seora’, the awakened who uttered abusive language at the system administrator] [Do you wish to sign a contract with the system administrator?]​So I happily signed a contract with the little system administrator who had appeared out of nowhere…【The overall evaluation value is readjusted.】【The Awakened ‘Yoon Seora’ (S-class)】​Wait a minute, Administrator-nim.You didn’t mention I would jump from F to S-class.【Administrator: (´ ε ` ʃƪ)♡】【Administrator: ♡ (ʃƪ ˘ ³˘)】【Administrator: (ง・▽・)ว】In addition, this administrator who overuses emoticons is too unreliable.Whatever. By being an S-class I was going to quit being a dirty civil servant who always works overtime.“I’ve never seen you in the past. Who are you?”“Hi, I’m a contractor for the world administrator.”​“I have never seen you before. Who are you?”“Hello? I am the world administrator’s contractor.”Somehow, I ended up in the center of an incident where the world is filled left and right with returnees. Can I really quit?Resignation Difficulty SSS+. Stay alive, office worker!