Nothing But Requiem

Trapped in despair after losing her beloved, a girl was greeted by a demon.
The demon offered her the magic gun, "Blutgang," and whispered, "If there's something you wish for, you have to make it come true."
The girl who lost everything. In its place, she gained absolute violence.
In a brutal world of injustice and bloodshed, today she will stir up the sound of gunfire.
To see her beloved once more.