Saredo Tsumibito wa Ryuu to Odoru anime
It’s a world teeming with dragons and Jushiki sorcerers. Jushiki is a devastatingly powerful formulation which may change the laws of physics, effective at producing large TNT explosives or toxic gas via plasma and atomic fusion. A down-on-his-luck sorcerer called Gayus joins forces with all the beautiful but cruel Jushiki practitioner, Gigina, as bounty hunters chasing dragons. Then 1 day, they’re introduced with an unusual request: to function as security guards for a grand festival put on by Mouldeen, the ruler of the kingdom. It’s then a mysterious serial killing of Jushiki sorcerers starts.