Toaru Majutsu no Index: New Testament - Volume 3, Chapter 4: Isolation and the Collapse of the Rules. Trident.

The 27-year-old Wei Han is a slightly fat, slightly chicken-livered, and slightly foolish, pure-hearted and besotted top, and his sweetheart who had been together with him for seven years, in the end, was stolen away by Qi ZhiFan one morning.
Deeply broken-hearted and in despair, he went overboard with binge eating, and ended up pathetically choking to death…

Strength.... That's all that matters in the end.

After being abandoned by his own family, and shunned for having no mana in a world dominated by magic, ex-prince Arvell Relas Vispia was forced to live on the streets with whatever meagre money he had left.

However, fate had something else in store for Arvell.

After meeting the spirit inhabiting his amulet, Arvell gets reborn as a Nephilim.

A being that has the powers of a god.

Time, Space, Life, Death.

All submitted to the authority of a Nephilim.

Betrayed by those he once called family, Arvell swore to get revenge.

Revenge on all those that mocked him and shunned him as a 'failure.'

Revenge on those who betrayed him without a second thought.

This is a tale of how a young prince shunned by the world as a 'failure' rises and ascends to the pinnacle of strength.

In the 21st century, a young judge time-travels to another world.Here, martial arts are evergreen, and myriad schools compete for dominance.Confucianism: Immense righteousness, impervious to all laws.Legalism: The power of rules, the law follows the word.Military strategists: The power of conquest, invincible in battle.Mohism: Ingenious mechanics, ordinary humans rivaling gods.Yin-Yang school: Numerology and the five elements, seeking divination, pursuing good fortune, and avoiding disaster....What's this? The Legalists grow stronger by adjudicating cases?Li Nuo, who has just vowed to advocate for the people and eliminate the corrupt, discovers that his father is the greatest villain in the court.Faced with countless enemies seeking revenge against his father, Li Nuo says he only needs one sentence.'My lady, guard me!'

In order to take away her father’s shares, her husband colluded with her bestfriend to set her up. A divorce was thrown at her face and she was forced out of the house.

Four years later, she returned with an adorable treasure. With his hands wrapped around her waist, her baby son said, “Mommy, I heard that it’s the trend now to have a godfather. You wait, I’ll find one to support you!”

A few days later, her son brought back a super handsome guy who looked exactly like him.

“Mommy, don’t worry, I’ve checked. Dad ranks first on the world’s richest list and is able to deal with all kinds of disapproval!” Her son said confidently.

Cheng Liyue: “…”

Looking at the startled woman, Gong Yexiao coldly threw out a paternity test, “Woman, when did you steal my seed?”

Cheng Liyue was furious. Which bastard was it who slept with her four years ago but did not assume responsibility for it?

- Description from Novelupdates