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 war went on incredibly well. The New Empire's heavy equipment, which was used with effective battle strategies, forced Shensha Empire to a corner, unable to retaliate.

Like flowers blossoming, both battlecruisers in the sky began to transform. Nine sets of 485mm naval artilleries sprung up and aimed at the ground below, where the enemy troops were marching.

A rain of bullets flew towards their targets. There were no loud bangs to be heard or bright flashes to be seen; only toy-like sounds — 'Biu! Biu! Biu!' — could be heard. The bullets were incredibly powerful, though. A single round of fire was enough to destroy an enemy base. The 485mm naval guns were more deadly than the 'Italian' artillery used in the war that happened a decade ago.

The End: What a Good Life