The Last Demon And The Last Sword

a girl (you) grew up born as a demon, her parents were normal and her siblings were killed when she was born. in the Japanese traditional estates she'd had been, she owned had her own, nobody knows that she's the demon

a few days later another girl named Saru with a little sister named Sarori came to investigate who the killer of the killers were, it was her. Saru was really clingy to you, even begging to stay 'just in case' something happens. not knowing shes the demon, she bullies a girl named Riana but Riana has a over protective brother who tried murdering her (you).

you lived for hundreds of years and you now look like you are 18. (your apprence is at the start of the story by the way. also. this book contains strong suicide, blood and gore, strong violence and sex, for your safety this book is for 18+ not under age strictly.)