Relates the adventures of Sosuke, a trained operative from a secret organization and a high school student.

Former mercenary Sagara Sousuke might just be getting comfortable with his life in Tokyo. After all, most students his age would love to go on a triple date with college girls, attend a drinking party in a house of welcoming foreigners, or take a day off while the school hosts a VIP... but then, things for Sousuke are never quite that easy. Not only does none of that quite go as planned, he also has to save a delinquent double agent from exposure and interrupt a late-night hot pot party to foil robbers at the school! No matter how the days might feel like heaven, Sousuke never fails to find a little slice of hell!

The secrets of the Whispered have been revealed, but that knowledge has only brought new danger. Leonard has retreated to Merida Island, where he seeks to rewrite reality itself with Kaname by his side. And with Mithril's forces already aching and depleted, Amalgam has occupied a Soviet missile base—with the intent to trigger worldwide nuclear war! It's a two-fronted battle on Merida Island and the mountains of Afghanistan for the penultimate volume of Full Metal Panic!

Volumes 4-6, now in a collectors hardcover edition, and with a brand new translation! With the defeat of Gauron, Sousuke's life has entered a comfortable rhythm. He's adjusting to school--the occasional car bomb false alarm notwithstanding--and balancing his newly-found normalcy with the needs of his mercenary life. He's even started to turn his thoughts toward the future--a future that might involve Kaname. But that future will soon face a threat, not from North Korean soldiers, Italian mobsters, or Russian spetsnaz... but from the hierarchy of Mithril itself!

What could be more romantic than Christmas Eve on a cruise ship? That's what Kaname is thinking when her school decides to schedule a make-up class trip... at least, until Sousuke declares that he's made other plans. He'll soon find that he's needed, though, as the ship finds itself beset by half-hearted terrorists, killer robots in the hold, and worst of all—a wannabe hero who's seen too much Die Hard! With the specter of Amalgam hanging over everything, can Sousuke probe the mystery behind them, while also keeping Kaname safe from harm?

Sagara Sousuke isn't your typical high school student. He reads military enthusiast magazines; he responds to questions with "affirmative;" he brings grenades to school in his bag. Though everyone at school takes him for a hopeless military geek, Chidori Kaname thinks there might be something more to him. When their plane is hijacked in the middle of a field trip, Kaname's instincts will prove correct: Sousuke is an elite, mech-piloting mercenary... and he's here to protect her!