Taiga from the elementary division joins Rena and the others at Mihama Academy Class A. Chris gets named as her higher officer, and she asks Haruto, the handler for the reason. What does Chris think as she carries Taiga on her back after a hard workout?

Chris fights the terrorists with explosives but gets shot. Class A heads to the scene after receiving a warning. Class A's operation begins.

Several years before, Haruto visited Yuuki's village to learn "Phantom Blade." One day, the village got ambushed, and Murasaki suspected Haruto.

The battle is coming to an end. This is the story of Phantom Trigger drenched in blood and smoke.