photo in background looks like has the murderer girl in the middle, assuming that this is the room of one of the girls in photo, the other two were the girl in body bag and the girl thats currently the pov. considering the title, might be a case of yuri yandere or jilted love/love triangle or both. In any case, as you are the pov girl, you have seconds to think of sth nice to beg for your life before you say goodbye to your head