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

A melancholic tale about young girls who serve as fairy weapons and a lone hero who outlived his time. In this world, humanity and other species were nearly wiped out by mysterious creatures called beasts. The survivors abandoned the surface and now live on a floating island named Regal Ele. Willem Kmetsch awakens above the clouds five centuries later, haunted by his failure to protect those he cherished. Consumed by despair, he remains the only one left from his era.