After the Empire's invasion, Princess Isabel of Rune Kingdom is forced into an unhappy marriage with a cruel Earl. Only a few years in, and she receives news of her older brother's death... On the verge of despair, Isabel returns to her happy childhood before the invasion.

As her nightmarish, war-stricken years begin to loom on the horizon, Isabel makes a promise: she will change the future! If she can become the top graduate at the Academy, can she dream of a new destiny? And will she manage it, with all these up-tight classmates?!