Spectral Wizard: Saikyou no Mahou wo Meguru Bouken

Men are servants of knowledge.
The Sorcerers' Guild was no more... The guild possessed many dangerous grimoires, worshipped pure magic. The guild was condemned as a terrorist organization. A chivalric order of scientists was formed, hunting it down. One after another, the sorcerers were captured, executed. Gradually, the guild lost its power. Eventually, they declared disbandment. The remaining sorcerers were scattered across the world, marked as dangerous, forced to live as wanted criminals.
Spectral Wizard was among them...