MTL - Plane Source Code - Chapter 1 Stuck in source code

In the Wild Westlands, the Sanctuary of Spirits is the base for the elite Celestial Beast Sect. “”Hurry, Huang Yingyan, or we’ll lose our chance at the best Divine Pets!”” Tang Jinghuan urges, pulling his friend in a time-critical dash.Huang Yingyan, who overslept from the thrill of gaining a mysterious system and the Omniscient Eye skill, falsely blames his delay on Tang Jinghuan. This skill lets him see the untapped potential in divine pets, essential for aspiring Beastmasters.In their excitement, they reach the selection, where Huang Yingyan’s skill initially finds no special pets—until a unique, snow-white cub draws his attention, neither tiger nor lion, with a somber air.As they face their choices, anticipation hangs thick. Can Huang Yingyan’s skill reveal the cub’s mystery, changing his destiny as a Beastmaster?

When I woke up, I had been reborn as a baby. My mother passed away and I was neglected by my father. Even though I was born in a Marquis family, my life started on a HARD MODE. But I won’t be discouraged. I will eat well, sleep well, move much, get whatever I can get and live happily.

He rose from abjection and achieved eternity in glory.
He embraced the prettiest beauties and killed the strongest opponents.
He was able to shift the clouds into rain and cover the sky with one hand.
He could overrun the entire world and go anywhere as he pleased.
He pacified wars and held the world in awe.
He was matchless in the world.
However, his hair turned white overnight for his beloved woman and he was on the verge of death.
He was surrounded by enemies who were trying to take his life.
He struggled his way to become mighty and fought for everything he cherished.
For this age, he was the only king of the Dark World.
His name was a byword for might.
As a man living in the world, his only ideal was to pursue brilliance.

- Description from Novelupdates

The head of the London Association of Mages, the most powerful Saint Archmage in the world, Audrey Davis, accidentally transmigrated to another world due to a magic accident. She was an 18-year-old human girl.