Sixteenth Basket of Mantaos

Imagine being forced to live, after death, as incorporeal bodies trapped in a vast space of nothingness for thousands of years, with nothing to do but exchanging past memories with other cohabitants (read: weirdos).  Everybody wanted out, but there was no way to leave the Void... 
Until one day, a young man was finally summoned, as a powerful but reluctant mentor, by a bubbly and motivated but completely naive young girl. Baiyi, finally out of the Void, was the only one who could save all of the other 32 souls from their prison and his summoner might just be The Key to their freedom.
However, Baiyi had to use the techniques and abilities the other souls had taught him throughout the years, and together with his own extensive knowledge of anime and game tropes from his shady and dangerous past as an otaku, to face the biggest challenge of them all: training the clumsy young girl he was forced to partner up with… into a competent sorcerer!

EndlessFantasy Translation 

Why Did You Summon Me？

The cataclysmic tremors of the earth made the Archmage alarmed. "Retreat! Retreat to the center of the city — no, retreat to the final defense line!" The First Voidwalker shouted, after which he raised his staff to activate the emergency teleportation portals set up by the Voidwalkers at different points in the city. The Archmage's spell also caused the city's bell to begin tolling.

When everyone in Arfin City heard the tolls of the city bell, they glanced at each other in dismay. They quickly abandoned their posts and fled to the nearest teleportation portal, headed to the rendezvous point.

This left the believers free to scale the city walls, like a colony of ants assaulting a jar of sugar. The believers that scaled the wall did not chase the city guards; instead, they opened the city gate for other believers to charge in.

An Outrageous Act of Wickedness