Masamune that died from accident, get his life picked up by goddess, and they go on to journey for defeating demon lord in another world. Masamune got only one cheat ability that is “Card that can conjure magic”. Each card doesn’t have that much power, but Masamune is a japanese champion of trading card game. With the combination of card that can’t be expected by any people, Masamune defeat demon king’s army. By increasing his companion and his card in his sleeve, he will be called by the title of ”Maten no Kenja”. This is the story of boy with name of Masamune that will defeat demon king.