Tang San's Twin Sister - Chapter 129

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

The countries of Mephius and Garbera have been waging a war for ten years and are trying to put an end to this long fight through a political marriage between the two royal families. Orba, who was driven from his home because of the war and was forced to become a gladiator, looks exactly like the crown prince of Mephius, and it has been decided he will be substituting him during the wedding ceremony. On the other hand, Vileena, the princess of Garbera, has secretly decided to ensnare the crown prince for her own country’s interests.

Suddenly, the mysterious book I received turned out to describe my own life?Once I chose to change my destiny, the life within the book changed as well.In the book, I encountered insincerity, spent ten years behind bars, and witnessed viruses laying Siege...Cancer, bus plunging off cliffs, plane crashes, senile dementia ... even the end of days – a variety of deaths; was this fate's punishment for the rebels?No one is a hero; it is just that this disaster-ridden fate forcibly made me into a warrior charging into battle.Those who killed me over and over will ultimately make me stronger!Through numerous life simulations, I amassed wealth from the financial markets, rescued innocent girls from felons, and acquired advanced technology from the future...Although I always encounter various disasters and accidents, I still strive to flutter the butterfly's wings, changing my original fate little by little.After countless simulations, the world too embarked on a completely different path.However, where did this autobiography come from?Behind it all, what kind of unknown conspiracy is lurking...[A literary man's laid-back daily life of unlimited simulations to save the world]

He was on his way to buy some beer to celebrate his acceptance as a civil servant when he was suddenly isekai’d by truck-kun.