Xander Nolte, once an ordinary mathematics student from our world, entered the Taruna Academy. This is the place where the children of the highest aristocrats of the empire study, so Xander did not count on a warm welcome. But who could have known that already on the first day there would be three fools who challenged Xander to deadly magic duels? But none of them took into account that a person with a mathematical mind and the ability to calculate various options for the development of events is not such a simple goal.