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？

Thus, the largest exodus ever recorded in mankind's history began.

The King blew his conch shell horn again, and a thick, black, mass of people marched, from different directions, into the royal garden where the transporter portal was located.

If the people were only able to travel on land, then a hundred million people would not be able to escape together, making the scene resemble the one which the Lich had predicted. It would not matter how fast the Scholar worked; 12 hours alone would still not be enough to save everyone.

At the King's command, the sky suddenly darkened as a blanket of skycruising rays hovered above the formation. Each ray had at least a dozen passengers on its back, and they fell into orderly line columns according to their individual heights, leaving the air above the transporter became completely packed with skycruising rays.

Thank You