Территория Абсолюта

A half-breed, loyal friend, and alumna of the military academy at the Institute, the main political force of the last remaining city in the world, wants to live her peaceful life and earn acceptance from the untrustworthy. However, a perimeter of particularly dense darkness breaks through and awakens the demonic nature in the heroine. The girl must control herself and help the city, even if it considers her to be a monster herself.

[from itch.io]