MTL - Custom Made Demon King - ~ A bit of Calvin, help

After losing his parents to the apocalypse, Silas only wished for one thing. To awaken a powerful mutant ability and purge the earth of any iniquities. However, his dream was shattered when he failed to awaken any mutant ability on the day of the awakening. He was bullied by his peers. However, when all hopes were lost, Silas awakens a system. [Silas Griswold has met all requirements to become a host] [System binding... ] [To complete binding host needs to complete three quests] [Congratulations, you have completed all quests ] [System binded successfully] [Your evolution will now begin!]

Ye Muyu, an elite of the modern company, got married and had children directly after time travel. She became the lady of an ancient scholar and the mother of two children, and she also found out that there was a “sister-in-law” who hated her very much.

Not only that, but there is also a ‘reborn’ female supporting role Tang Rou who covets her position everywhere.

Tang Rou: “Your position is mine, and I will be the first-rank madam in the future.”

Ye Muyu looked at the dark-faced man in front of him, and nodded calmly: “Okay.”

A certain man instantly protected Ye Moyu: “You It’s my wife, don’t even try to get rid of me, idlers, get out.”

The son hugged Ye Muyu’s thigh: “Go away, my mother is so nice, if you dare to bully her, I will bite you to death.”

The daughter held Ye Muyu’s arm Arm: “You are a bad person, my mother is the best mother in the world, if you dare to speak ill of my mother, I will report to the police.”

Seeing the happy family of ‘Ye Shi’, the reborn Tang Rou secretly hated her Grinding: It shouldn’t be like this, everything has changed!

- Description from novelbuddy

Shi Jin once read a book. It was supposed to be about satisfying the desire for vengeance.

The main character, also named Shi Jin, was the sixth son of his harem-novel-protagonist-like father. All was well—while his father was alive. But after his death, Shi Jin’s five elder half-brothers tormented him, eventually leading to his death. The protagonist was reborn, determined to take revenge, and… the novel was discontinued.

That day, Shi Jin almost spat blood and dropped the book into a shredder. The next day, he died in a car accident. Somehow, when he came to, he had transmigrated into a teenager, a youth also called Shi Jin.

There was only one problem. His father had just died. His older brothers were about to torment him…

Shi Jin: Let’s eliminate my brothers’ hatred, my goal is to keep my life!

- Description from Novelupdates

Zero, a 35-year-old mercenary, after being betrayed by one of his teammates who told his enemy about him. He chooses suicide so that he can kill his enemy and his traitor teammate. After that, he was reincarnated into the world of magic, in the body of an 18-year-old teenager with the same name as him. However, his body does not have mana or the talent for magic. But with the help of the cultivation system, he has unrivaled power in the world and has a harem of beautiful wives.