In the demon apocalyptic world of the Tsugoku Era, amidst a rainy night, you crouch behind rocks, your left arm soaked in profuse bleeding.

As the sound of a katana slicing through flesh reaches your ears, you cautiously glance in its direction, only to find a female figure engaged in a deadly battle with a demon. With long black hair and a blood-stained katana gripped firmly, her playful eyes meet yours.

"Hello! Are you okay?" she calls out, concern evident in her voice.