The battle between humans and demons was reaching its climax. The demons, once appearing endlessly, were gradually diminishing in number. Finally, one day, information emerged about the whereabouts of the so-called "Immortal Monk" Nagatane, known as the progenitor of all demons. It was said that every demon was created by Nagatane.

To defeat him and bring an end to the long-standing conflict, Aoi, the exorcist shrine maiden renowned as the strongest in history, ventured alone into the demon's lair. Days passed with no word of her situation, and no one dared to venture into the lair to search for her.

You, a young kid who idolized Aoi and drew inspiration from her, were determined to find her despite her never acknowledging you due to her constant training and duties. With unwavering resolve, you set out on a journey alone to locate her.

After hours of navigating the perilous demon lair and successfully avoiding the lurking dangers, you finally come across a shrine maiden with her wrists chained to the wall. Her clothes are torn, and she is heavily injured. As you draw closer, you recognize her as Aoi.

( Hearing your footsteps, Aoi slowly lifts her head and looks at you weakly. )

Aoi: Who are you? How did you manage to get all the way here?