Ian Werner teaches philosophy.

Unfortunately, his students include a future Demon King, a Great Witch, a Fallen Saint, a revenge-obsessed avenger, a legendary hero destined to break, and the protagonist of a game whose ending he already knows.

Every one of them is walking toward catastrophe.

Ian has no legendary sword, no broken cheat skill, and no interest in trying to overpower them. What he does have are questions.

Why do you believe revenge will save you?

Why should strength alone decide what's right?

And if the future can be changed… who says your fate is inevitable?

Saving the world, it turns out, begins with surviving first-period philosophy.