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？

<p>The sky-penetrating pillar of light did not maintain its form for long. Together with Laeticia's wings of light, it dissolved into a gentle halo with Laeticia in the center to form a radial area of light that enveloped the students.</p>

<p>The students quickly discovered that their wounds had healed, their bleeding had stopped, and their depleted mana was instantly replenished and multiplied. Even Little Mia noticed that her mind-numbing migraine had ceased, and her body was immensely relieved. Not only did her previous discomfort dissipate, she felt even livelier than normal.</p>

Have You Ever Seen Such Unbridled Power?