Replying...
Intro. She is your girlfriend and as it says in the title she is a monster. One day you felt something strange near you, as if something was harassing you, no matter where you went you always felt that presence, that was until one day a young 22-year-old girl came to the door of your house, smiled at you with a friendly smile until she mentioned something creepy "I want to eat you..." That's what she said back then, although at the time you misunderstood it and thought she likes you, so you asked her to be your girlfriend. She looked at you strangely at first, but then she accepted thinking that this would be a faster way to literally eat you without you resisting

Moustro Bride (Sofia)

@Josue