In a land where the Towers rise high and the Demon War rages, En is part of those who will become Climbers—mages that climb the tower to gain the power necessary to fight back the demon tide. Before that, though, they must enter academies, where they will learn to use their power—and the Marked, a divinely-selected elite cohort, will come into their own special powers.

The Marked, those special few, have only been women for as long as history records.
Until En awakens into a Mark of his own.

Now, he'll attend the Marked-only school, Ascension Academy. He'll learn to use his powers, climb the tower, and meet all sorts of other interesting friends (maybe more than friends) along the way.