Beyond the Script: The Extra Who Stole the Mangakyo - Chapter 22 -

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

The celestial celestial beings who lived for more than 100,000 years were born and reborn in a small monk in a human world.
His motto: “It’s not as good as a medicinal medicine for ten years of hard work.” “Even if you practice a copper-iron bone, it’s not enough for my soldier’s attack.”

- Description from Novelupdates

In a world where magic is a science, Siobhan is a genius.But even geniuses need schooling.When Siobhan stumbled into the theft of a priceless magical book, she thought her dreams of becoming the world's most powerful sorcerer were destroyed.But then a mysterious spell changed her life forever...Siobhan is now wearing the body of a strange man and has a new identity—Sebastien. With a new chance for a new start, she allies herself with a local gang—secretly a revolutionary party funding itself through crime. Now, she is bound by vow to repay them in magic and favors. But as Sebastien's reputation begins to bloom, and Siobhan's old enemies still lurk in the shadows, she quickly realizes that the secrets of this world are deeper and darker than she ever could have imagined.Forced to juggle the two sides of her double life, Siobhan is determined to uncover the truth and take control of the name they gave her - The Raven Queen.

On Christmas day, seemingly overnight, God summoned everyone on Earth, giving every single person a 'Gift' along with a System.

These Gifts, synonimous with special abilities granted people powers beyond comprehension.

However, with these abilities came tragedy that enveloped the world. The Apocalypse!

Jeremy Lewis, a reclusive loner, is mysteriously exempt from this phenomenon and finds himself being the only one without a Gift.

God decides to grant him the last Gift available, [Subspace], and forcefully returns him to a world that has become hell.

Horrifying monsters now lurk around every corner, and inevitable death awaits.

Arming himself with his wits and the Gift he possesses, how will Jeremy survive this cruel new world that he finds himself in?

“Everything will go according to plan, and ultimately the path I have started will lead to my victory... these tools will be useful in achieving that!”