Taken From Izumo No Ryuu:

It seems some killing machines have woken up, and want to destroy every sorcerer on the planet! But Orphen isn't allowed to die, so he must stop their evil plot. This is a side story to the first Orphen manga, but you don't have to know much about the Orphen universe, so go ahead, read on!

[From ADV]:

Orphen, the tough-talking sorcerer-for-hire, is putting his wand-wielding skills to use for quite a price, but with a boneheaded companion and a wide-eyed pupil tagging along, they can’t help but attract a little trouble! Magical mercenaries are all around, and the hair-triggered Orphen is no stranger to a good fight, so he’ll have to cast his spells in record time to stay in the game of magic in Orphen.