College student Iwatani Naofumi is reading a book titled "The Records of the Four Cardinal Weapons" in the library when he is suddenly summoned to another world and told he has to save the world as the Shield Hero, one of the Four Cardinal Heroes. And one morning, he finds all his money and equipment gone.
It is said that the legendary weapons 
repel one another by nature.
يُقال بأنّ الأسلحة الأسطوريّة تتنافر بين بعضها
البعض فطريّاً
Der Sage nach besitzen
die legendären Waffen
Las historias dicen que las armas
legendarias se repelen entre ellas.
Las historias dicen que las armas
legendarias se repelen entre ellas.
Selon la légende,
Si dice che, per natura,
le armi leggendarie si respingano a vicenda.
É dito que cada arma tem a
natureza de repelir umas as outras.
Предание гласит, что по природе своей
все четыре Оружия противостоят друг другу.