WorldEnd: What do you do at the end of the world? Are you busy? Will you save us?

It has been more than 500 years since the dreadful and enigmatic "Beasts" nearly wiped off the human species. In order to remain out of the range of all but the most mobile Beasts, the remaining races have now built their homes, towns, and cities up on floating islands in the sky. The only ones who possess the ancient Dug Weapons required to repel incursions by those terrifying animals are a group of young females known as the Leprechauns. A mystery guy who lost everything in his final struggle five hundred years ago and had awoken from a lengthy, frigid slumber enters the people's fragile and transient lives, where a single call to certain death could come at any moment. When he is unable to continue fighting, the man, Willem, steps in to be the father those children were never given, taking care of them and nurturing them even as he struggles to adjust to his new life. In this new life, he now experiences the same agony that his "Daughter" once felt for him as he helplessly waits for his loved ones to come home from battle. Willem and the leprechauns gradually learn what family is all about and what in their lives is actually worth defending.