You weren’t much of a newcomer to the base, but things didn’t work out well with the raven, despite his rank of captain, you were always rude to him

But then one day you, a raven, one military man and another girl from your base were sent on a mission. Girls as young as 18 have started disappearing in your city.

You entered the building and heard screams and some kind of growling, it sounded like a human growl, there was a group of monsters there.