You Were Supposed to Teach Students, Not a Violent Lolita to Swing a Staff

Gu Cheng transmigrates to Aethergard and spends ten years signing in at the library of St. Freya Academy.

He meant to be a laid-back librarian, drinking tea until the end of time, but was saddled with an F-class of “hopeless failures.”

He can see through the essence of all things at a glance! In his eyes, every flaw in magic is a path to divine mastery.

[By discerning the inner circulation of mana, you guide Irene to a breakthrough: she comprehends internal mana pressure and becomes a walking calamity of brute force!]

[By analyzing holy light and death, you guide Carl to a breakthrough: he comprehends reverse conversion, turning a healer into the Reaper of Holy Light!]

[By reconstructing spatial trajectories, you guide Lucia to a breakthrough: she comprehends saturated arrow formations, unleashing map-wide attacks!]

[Through divine sign-ins, you strip away the laws and comprehend their incarnation: with a single word, all magic obeys!]

Irene: Whoever lays a hand on my mentor, I'll smash their damn head in with this four-hundred-kilo staff!

Princess Victoria: Please, Professor Gu, look at me just once more! I'll offer you every artifact in the empire just to hear one of your lessons!

Demon King Mephisto: I once wanted to destroy the world, but now all I want is to sell tea outside Gu Cheng's door for the rest of my life...

Dean Reno: I asked you to teach the F-class, and you turned them into a bunch of Archmages?

When the abyss descends and the world faces annihilation, Gu Cheng walks out of the library with his teacup and sighs:

“To enjoy a quiet cup of tea, I guess I'll have to kill you all.”

In that moment, he is Truth itself, the one and only.