Toaru Majutsu no Index: New Testament - Volume 2, Chapter 4: Invitation, and That Name Is... Lecture_Four (and_More).

The Mc reincarnates in a world of magic and adventure as a Leech, follow his adventure in this mysterious and exciting world as he goes from the weakest creature to the shadow being that everyone is afraid of. Will he pursue the path of strength alone? Or without realizing it he will become the king of the greatest empire that ever lived.

[Group Pet + Koi + Prediction + Boss + Vest + Food]

The scientific research boss travels through the farmhouse, and the sick child becomes a three-year-old fan who spits milk. Comes with a koi physique, full-level genius doctor skills, and proficient in growing delicious food…

Wait, when did I have an extra predictive skill? The misfortune of the father, mother and elder brother is easily resolved by the milk dumpling, and the unlucky physique of the fairy brother is cured without medicine, and Xinbao only wants to eat, drink, play and be a rice worm in this life…

- Description from novelbuddy

There is always such a person in the world, his family background is better than yours, his status is higher than yours, while you work hard and think all the way up, but with just a wave of his hand, you are wiped out. What is even more sad is that he doesn’t even know who you are.

Zheng Jue met Han Jin like this but he didn’t realize this truth until he died. In the end, he had found the wrong opponent and ultimately lost his life.

- Description from Novelupdates

It’s said that the prince of virtue had almighty martial arts. It’s said that the prince of virtue had the most handsome appearance in the world. It’s said that the prince of virtue was brilliant. But all was legend! A fire ruined his wonderful appearance and his legs. Even the talented bride under their marriage agreement were replaced furtively. Ye Liu-li was his bad-luck substitutive princess. She went a long way to graduate from Medical University and had her internship with pain and joy. Who knew that in order to save a suicide patient, she fell off the building and crossed time into a “chessman” of prime minister. She had also been married to the disabled prince replacing her elder sister. On the wedding night, when most other couples were having their romantic night, she was thrilled. It didn’t matter. Revenge never came too late. She would never let go of any of them who entrapped her or harmed her.