Saredo Tsumibito Wa Ryuu To Odoru E 5

In this world, special abilities called spell formulas (咒式, jushiki) exist, which are essentially chemical reactions augmented through special weapons that cause a magic spell-like effect. 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.