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？

Any non-expert trying to summon any being would face a certain difficulty when using a Summoning Scroll. For starters, they can’t just summon any being they want even if they were using a special contract. That was because without any communication between contract participants or teambuilding between the summoner and the summoned, the process and result of a summoning attempt would be unpredictable.

When an ordinary person cast a summoning spell, what they summon depended entirely on their mana and true strength. Vidomina was already long past the prime to even be able to summon a cute little kitten.

That was the nature of all summoned beasts. They did not care about how cute, rich, pretty or charming their summoner was.

No fury like a Hammerhead Shark