What Do You Do at the End of the World? Are You Busy? Will You Save Us?

'''Shūmatsu Nani Shitemasu ka? Isogashii Desu ka? Sukutte Moratte Ii Desu ka? (終末なにしてますか? 忙しいですか? 救ってもらっていいですか?), also known as Sukasuka''', is a Japanese light novel series written by Akira Kareno and illustrated by Ue. The series' first volume was published by Kadokawa Shoten under their Sneaker Bunko imprint in November 2014, with the series ending with the release of the fifth volume in April 2016.

A sequel series titled '''Shuumatsu Nani Shitemasu ka? Mou Ichido dake, Aemasu ka? (終末なにしてますか？　もう一度だけ、会えますか？), also known as Sukamoka''', began publication with the release of the first volume in April 2016; the second volume will be released on July 1, 2016.

Plot
Humans have been driven to extinction by "Beasts." The duty of fighting the Beasts fall to "Fairies," who are destined to use their powers to wield "Holy Swords" called "Kariyon" and eventually meet their destiny of death. A sole human being named Willem wakes up after several hundred years, and continues his fight against the Beasts.

Official

 * http://sneakerbunko.jp/series/shumatsu/ - Sukasuka at Sneaker Bunko
 * http://sukasuka-anime.com/ - Official Anime Website