MTL - Rebirth of the Film Emperor’s Beloved Wife - ~ 143 million thousand pets

An ordinary (?) grandfather, Choi Chuntaek. In an effort to protect his granddaughter, he started the virtual reality game 'Arkstar.'

Then... he accidentally obtained a legendary class?

The world of Wageah was vast. It was filled with ancient magic, fallen gods, legendary mages, and exciting adventures.Earthlings summoned there gained godlike power.Zeus, Odin, Count Dracula, the Monkey King. All of them were humans who returned from Wageah and became legends on Earth.But my class and I, who were summoned to Wageah?We were enslaved.We were used, discarded, and left to die.But fate gave me another chance.I woke up as a newborn on Earth with all my memories intact. And soon after…[Awakening Supreme God's Treasure: Shadow][System Boot Successful]I gained strongest weapon in existence. [Shadow]. The treasure of the Supreme God.This time, I’ll grow stronger from the cradle. And when I return to Wageah—I won’t be a slave.I’ll be the shadow that devours the gods.

In the third year of the reign of Yu State, it rained in the city of Weizhou.

Li Ang woke up in a daze, dreaming that there was a sword hidden in his head.

- Description from novelbuddy