Saredo Tsumibito Wa Ryuu To Odoru E 1

The series takes place in an alternate world, staged mostly in the city of eridana, whose territory is half in the tseberun dragon empire, and half in the lapetodes seven cities alliance. Spell formulists use these spell formulas to fight with "beasts of abhorrent form," natural creatures that use spell formulas and pose a threat to humans, such as dragons, aions, or enormes.