"Ah... surely... I have lived all this time just to meet him—"

Reika Himuro and her comrades are Class A magicians who wage daily battles against the "Threats," monstrous entities that endanger humankind. At the magic academy they attend, they spend their days looking down on and ridiculing Keisuke Tojo, an outcast boy branded as a bottom-tier Class F magician.

Then one day, an overwhelmingly powerful Threat appears. Mobilized for the emergency, Reika is entirely outmatched and finds herself cornered in a life-or-death crisis. Just when all hope seems lost, a mysterious masked man emerges, subduing the "Threat" with sheer, terrifying strength—?!