Karate Master Isekai

After the karateka defeats the Orc Mafia's summoner and his fearsome Ifrit, an assassin comes to claim his head: an elf warrior wielding a martial art known as High Elf Magic Jujutsu! And yet, it doesn't seem like our hero's would-be assassin is truly out for blood... Will the karate master survive and learn his foe's true motivations? Or will he succumb to his nimble opponent's joint locks and air blades in their clash of refined techniques?