Great Xia, front-line position.
An immense, large-scale fortification stretches across the central mountains of a unique terrain, dividing the vast landscape into two.
On one side is the camp occupied by human Spirit Contract Masters, arranged like small hillocks in neat rows, with a constant flow of Spirit Contract Masters and Contracted Spirits heading to the fortification, while many injured Spirit Contract Masters are withdrawn and sent back to the camp.
Large transport ships arrive from the rear, their reverse-thrust stabilizers spouting pale blue exhaust, kicking up a veil of ash.
One by one, young Spirit Contract Masters with youthful faces but solemn expressions swiftly disembark upon landing, quickly adjusting and engaging in battle mode.
Severely wounded Spirit Contract Masters and Contracted Spirits are sent back on the now spacious transport ships, which ascend again without delay, heading back to the rearguard field hospital.
On the gigantic fortification,
