Shirogane no Ishi: Argevollen

Tokimune abandons a retreat to help a transport under attack and encounters engineer Jamie Hazaford with an experimental combat machine. Piloting Argevollen saves him from immediate danger, but the system bonds to him, making him indispensable to its operation.

Jamie must accompany his unit to keep the prototype functioning as the war between Arandas and Ingelmia continues. Tokimune's impulsiveness and the machine's capabilities draw them into decisions whose consequences extend far beyond a single battlefield.