Misaki is alone. Why? Because she is a part of an agency to protect the wellbeing of the world. The world that she belongs in, involves guns, bombs and tanks. How peculiar... The biggest responsibility and rule is to make sure all of this is kept a secret, however, two years later, this secret was uncovered by the famous Usui. But, why is he unaffected by this unexpected news?

In the morning, Misaki is a regular high school girl like everyone else. At night, she heads out on a secret mission - to protect the world. How? With her powers! Unknown to Misaki, Usui is just the same. However, recently Usui has lost interest in saving the world. Misaki's power is not enough, they need to combine their powers to succeed. Time's ticking, will they ever make it?