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？

After that little incident, Baiyi's life returned to its tranquil and smooth normality.

However, unexpectedly, the students had become more eager in their studies, showing significant improvements in the homework they turned in. Was it because of Vidomina's earnest demonstration that day?

To have any of their small requests granted — surely that must be very enticing for them, right? They could ask for a holiday from school, or to exempt themselves from doing a day's assignment.

Unfortunately, Baiyi had not seen an assignment good enough to win that ultimate prize. On the plus side, none of the girls earned the "Feather Duster" grade again!

A Guaranteed Triumph