Sousuke finally stops being a punchline and becomes the soldier the show always knew he was. The comedy stops. Amalgam's assault is relentless enough that every victory feels like it costs something real, and by the final episodes, the cast understands they are not winning this war, they are just surviving the next day. This is what happens when a comedy series decides to make good on nine episodes of setup and actually break the people you've watched survive it.

Sousuke Sagara's secret mission protecting high school student Kaname Chidori has lasted nine months, and Mithril's success against Amalgam has only made that organization more determined. Its attacks begin with disruptions to communications around the world. Kaname is a Whispered, which makes her one of Amalgam's main targets, and Leonard Testarossa wants her and her knowledge. As Leonard Testarossa closes in, the fragile pretense of normalcy shatters, and her peaceful life at Jindai Municipal High School comes to an end. The fight starts in their own neighborhood and spreads across the globe, from Laos to the Mexican coast, as Sousuke gathers intelligence to bring Amalgam down. Meanwhile Kaname's abilities grow along with her frustration, and the pair try to connect and push past their limits.