You don't really have to be a magus anymore. Sure, if you're born into a magical lineage you'll have to learn the secrets and then pass them onto your own offspring or maybe inscribe them into the neurons of a bullfrog somewhere, but you don't actually have to practice. There is just no reason to get yourself involved in that nonsense. You wanna protect Humanity? Pursue knowledge? The ladies and gentlemen of the Association have that covered.

Despite this fact, mages just can't help leaving behind their peaceful and normal lives for the art, and the one who can help it the least is Filia Tertias. At the age of eighteen years, three months, and four days, he feels that he's seen all there is to be seen from the world of Humanity and goes leaping headfirst, fueled by hubris, into the most dreadful of the magical businesses, Hunting, and must pay the price when faced with monsters, men, and his own folly.