Satsujin-hime to Fushi no Majutsushi

Princess Elisa has been cursed by her dad, the king, who prayed to demons for peace in his kingdom. The curse made the young girl bloodthirsty. As she slaughters criminals at all costs, she sliced an immortal wizard named Grem. From their meeting will be born a surprising and delirious duo, which will apply to drive out the demons!

(Source: Komikku Éditions, translated)