The Guard Corps of Astaroth has a serious crisis on its hands: the repeated attacks on the Royal Capital have taken their toll, and now they've been left with a severe shortage of able-bodied defenders. When Sieg and the Fifth Squadron go out recruiting, they stumble upon Leobolt-who might well be the best swordsman in the kingdom! He seems like the perfect fit for management, but it doesn't take long for him to start taking his reforms a bit too far. Is the Fifth breaking up?! With some of its members scattered, Sieg rushes off to find Spinoza, and her mysterious origin finally comes to light. Can the team take back the Guard Corps before it's too late?