Ryuu to Ryuugoroshi no Miko

A certain human country has become prosperous in exchange for sacrificing a maiden to a dragon. But with their progressing civilization, humanity then found the power to defend their country without having to rely to the Dragon anymore. Feeling that the Dragon has became a relic of the past, they picked a priestess to kill the dragon.
However, the Dragon fell in love with the priestess at the first sight instead! A new and upcoming "killing" romantic comedy!