Merla, a daughter of aristocracy by birth, a commoner by circumstance. With her inheritance sacrificed, she must work, and there is no better fit than the Public Defence Force, which stands between her home and the miasmic beasts that lurk. In the safe havens, the masses are protected by the magic-like craft the Force wields.

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​As attacks surge in frequency, Merla is on the front lines, warring for survival with her comrades. The chaos that will befall humanity looms overhead, and the powers that be turn a blind eye. With tenuous new bonds, she must find a way to curb the destruction of districts across the region.