On the surface, Kaname Chidori appears to be a normal, popular high school student. The problem is, she doesn't realize just how popular she is. Unbeknownst to her, a group of terrorists believe she possesses the special powers of "the Whispered," and they're out to kidnap her.

Jindai High School was a relatively safe place, right up until Sousuke Sagaka transferred there. A total nut, he wreaks havoc on the school's student body and gets into a world of trouble with the teachers! But there's more to Sousuke than meets the eye - not just a hell-raising student, he's actually a member of an elite military unit, on an undercover mission to protect the beautiful schoolgirl Kaname Chidori from the KGB.

For Sousuke Sagara, undercover high school student and member of the mercenary group Mithril, life in Tokyo seemed the same as always. But underneath the promising exterior spin the wheels of a conspiracy that threaten to destroy the peace. A new threat has arisen: Amalgam. An unknown element with advanced mech technology, this mysterious organization has been running things from behind the scenes.

With a traitor in hiding, Mithril goes on the hunt. One crashed party and a high-speed gunfight later, the turncoat's information has the mercenary group abuzz. There's a new threat to world peace: Amalgam. An unknown element with advanced mech technology, this mysterious organization has been running things from behind the scenes.

As the Chinese conflict rages on, hostilities reach a fever pitch. The final countdown hastens near. The SRT offensive is launched, but Sousuke has abandoned his post. Cryptic messages from a bloody past lead the young mercenary to face his demons, the battle within no less than the one without. Life and death hang in the balance as the clash between good and evil scale new heights. Piloting the Arbalest into the dawn, the last act is set to begin.

It's tough to keep your grades up without having to take off at a moment's notice to save the world. But for Sousuke Sagara, undercover high school student and member of the mercenary group Mithril, life in Tokyo seemed the same as always. But underneath the promising exterior spin the wheels of a conspiracy that threaten to destroy the peace. A new threat has arisen: Amalgam.

It's tough to keep your grades up without having to take off at a moment's notice to save the world. But for Sousuke Sagara, undercover high school student and member of the mercenary group Mithril, life in Tokyo seemed the same as always. But underneath the promising exterior spin the wheels of a conspiracy that threaten to destroy the peace. A new threat has arisen: Amalgam.