Starting from Robinson Crusoe - Chapter 142 - 59: Illness

Life Demon, Law Demon, Knowledge Demon, Fate Demon, War Demon…

When various strange forces invaded, the world has since been divided into two distinct ends.

Some people worship him as a god and walk on the earth as a spokesperson.

Some people choose to drink a glass of strong wine on the scarlet night and raise the shotgun in their hands.

- Description from novelbuddy

The MC entered the body of the An family eldest son, An Ziran, an arrogant 16 years old boy who weighed 78 kg (~171-172 lbs), who only knew how to eat, play and sleep. Seeing his current body, An Ziran decided his first priority was to LOSE WEIGHT!

Three days later after he became An Ziran, An Ziran’s father and his biological mother died, which meant as the eldest son he had to take over the family business.

Beside his legitimate first wife, An Ziran’s father also married 3 others women, who all wanted to take over the An family fortune but only the eldest son could be able to touch it, therefore they have to depend on An Ziran in order to live a comfortable live.

An Ziran’s father also had an older brother who is always planning to steal the An family fortune. The elder brother of An Ziran’s father and the woman he married had powerful connections. In order to save the An family fortune, An Ziran has to find a golden thigh to cling on. The butler told An Ziran that there is an engagement between the An family and an influential family. Therefore he takes his sister to that family house to make a connection.

However, during their journey, An Ziran’s younger sister overheard that the son of that family is UGLY, so as a beautiful and spoiled young lady coming from a rich household, she didn’t want to marry him and decided to run away. Without any other choice, An Ziran had to take his sister’s​ place and marry that man, who told him that he would let him go soon, but lied.

- Description from Novelupdates

Haruto Hayase was a normal high school boy in his third year, living a quiet life until his younger sister, Haruka Hayase, joined the same school. Haruka’s beauty and charm made her the center of attention, quickly becoming the school’s prima donna. But when a notorious gang leader set his sights on her, he did everything in his power to protect her—only to fail tragically. Haruka was brutally assaulted and tortured, and Haruto himself suffered an agonizing death. However, in a twist of fate, Haruto is given a second chance, waking up a year before the events that shattered his life. Armed with the mysterious ‘Debauchery System Slave’, he vows to exact revenge on those responsible. This time, he will use his newfound powers of the system and charm to seduce the loved ones of his enemies. From their mothers, sisters, and lovers to their closest friends, Haruto will make them his. His enemies will suffer as he steals what they hold dearest, ensuring their downfall in the most devastating way possible.

WARNING: Mature Content.He Craved Revenge.He is known to be ruthless, power-hungry, and untouchable.She never had a life of her own.She's powerless, forgotten, and unwanted.****Being the daughter of the wealthiest man in the country sounded like a dream, but to Anna, it was a nightmare.Stolen at birth by her father's mistress, and raised as the ‘illegitimate’ daughter of the powerful Steele family. She was treated as nothing more than a slave. Abused, neglected, and overlooked.Her life took an even darker turn when her half-sister chased her off a cliff, leaving her to drown in the raging river. To her family, she was dead, erased from their lives forever.Except Anna didn't die.She was rescued by a man she thought was her savior. Instead, he became her captor. Forced to sign a deal with the cold, mysterious stranger who pulled her back from the jaw of death, little did she know that agreeing to marry him would mark the very beginning of her real nightmare.****For ten years, Alexander Vaughn had one goal: destroy the Steele family. They took everything from him, now he was back to take their lives.But then, she fell straight into his grasp.Perfect.Six months. That was all he needed to ruin her, and the rest of her family.And the white-haired thing didn't fight back. She signed the contract.And that was when everything started to fall apart.