I Hate You, Devil! - Chapter 231 A learning tool

Gu Lu was a Paleontologist. He was very glad to reborn as a small dinosaur.

But the terrible thing was that he turned into a Triceratops cub inside a nest of Tyrannosaurus Rex.

Tyrannosaurus Rex was the strongest carnivore known in the history of the Earth, also called the “Imperial Species”.

Triceratops was an herbivorous dinosaur and the staple food of Tyrannosaurus Rex.

But fortunately, he had a very doting Tyrannosaurus Rex “Dad” called Mungo, who named him Gulu.

Gulu thought that he could only be a salted fish Triceratops holding Tyrannosaurus Rex’s golden thigh in his life.

Unexpectedly, he helped the Triceratopses escape a big glacier, Pterosaurs flying away from the volcanic sea, and the Sea King Gliodon fleeing from the super storm…

He became the “King of Dinosaurs” when he was not careful and was honored as “King Gulu” by the dinosaurs.

Gulu: Dad, this name you gave me is not domineering or cool at all!

Mungo: Gulu, lovely.

- Description from Novelupdates

A young boy was living peacefully.

Although he was poor and alone, he was happy with what he had.

Until one day, a girl came into his lonely life, making it worth living.

However, this also didn't last long when the girl he considered his only family in the world got afflicted with a mysterious illness!

In the end, he sold his parent's house, the last memory he had of them, hoping to save his Lil Sis.

He was even willing to live in the slums if he could save her and, for the first time in his life, stop this tragedy from happening!

But fate yet played another trick on him when a greedy shop owner sold him fake medicine and tricked all the money he got after selling his parents' house!

After being pushed into the corner, he hated those treacherous people; he hated the unfair life, and he even hated Heaven itself!

In the moment of hatred and helplessness, he holloed to the sky,
"IF I HAVE THE POWER, I'LL STEAL FROM HEAVEN ITSELF, JUST LIKE HOW IT STEALS EVERYONE FROM ME!"

However, this boy didn't know that this absurd wish would be granted one day by something called the system, and it would also force him to walk on the path of a THIEF!

A path that was despised and loathed by Heaven itself!

When necromancers perform a great ritual to summon an undead servant, they bring a powerful vampire into their world. And now, their fate is sealed as food, but for Klaus, this is just the beginning of his adventure. In a cruel world where people will do anything for power and immortality, he is already very strong and immortal, so what's left if not start a family and have fun stepping on arrogant people through the way?

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.