Unserious Beast Tamer - Chapter 92 - 81: The System Upgrade! !

The strongest Demon Lord dies, and reincarnates as a human. Not only that, he because of various incidents turns into the hero’s best friend.

Follow his journey as he tries to help the hero escape his fate, and on the sideline to conquer the continent while he’s at it.

Su Bei sat on No-Sword Peak, contentedly watching his female disciple scurry about.That would have completed his first task for his System Quest assigned by “The Highest Ten Thousand Fold Feedback for Discipleship” system!Xia Ruoching looked at Su Bei with a serious face,“Master, this is the spiritual fruit I got from the Sect Leader. He said it'd be helpful for your injuries!”Su Bei gazed at the half-black, half-red fruit in front of him and fell into deep thought.“Are you sure this is what the fruit looks like?”“......”“This is the real deal, Master! That half is definitely not poisoned! Eating this spiritual fruit would be such a wonderful experience, ah!”“?”“......”Years later.Su Bei, while leading one of his many disciples back to Sword Sect, suddenly sneezed and muttered,“That's strange. Why do I keep feeling like a bunch of people are cursing me?”The eldest disciple looked at the new junior sisters with a stunned expression, “What? You want to kill Master too?”......The book is also known as “I Have the Highest Ten Thousand Fold Feedback System for Discipleship.”“I Am a Transmigrator, Not the Su Bei You Know!”“I Really Didn't Steal The Disciples' Talents, Okay!”“Assassinations from the Reincarnated Disciples!”“Assassinating Master”

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

We follow the story of Song Lang, a genius in the police field, who due to unfortunate circumstances caused by his mortal enemy, now assumes the identity of a driver named Chen Shi. Although he had wanted to live out his days as an ordinary citizen, fate has other plans in store him. Finding himself in the position of prime suspect to a case, he assists a police officer to uncover the truth. Follow the adventures of Chen Shi as he is plunged back into the world of bizarre homicide investigations. Will he be fated to meet his enemy once again?

If you enjoy murder mysteries such as the TV show “The Mentalist”, or anime like “Detective Conan”, then this novel is for you.