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 tri-colored diamond on Giantess Attie's head glowed brightly, and the power, which was used against the Archangels earlier, bubbled within her body. However, Giantess Attie did not immediately fire off the pent-up power; instead, she turned to the Voidwalkers and mumbled, "So, where are the stars? I can't find them."

The Astrologer Walker almost flew into a rage when he heard this. "Just bloody shoot it anywhere!!! Aim as high up as you bloody can!!!"

At this point, with the constellation alignment almost complete, it was impossible to be calm and amiable.

"Ooh-kay then," Giantess Attie muttered, shaking her head in understanding. Before she fired, however, she said, "You know that I'll be using the last bit of power that Lord War God gave me, right? Everything that comes afterward will rest solely on your shoulders, okay?"

The Reinforcement No One Expected