Fate Secure Order

In 2016, the world ended. The human incineration order began and humanity was wiped out. This is a story of a single Chaldean staff, a technician, as he journeys through the Grand Order. Is there more to what he seems to be though? After all, dealing with anomalies is nothing new to him, and the end of the world? Pfftt, happened too many times to count.