Y/N is and regular human that found a mansion full of vampires. They are called BTS or the Bangtan boys. Y/N started to fall in love with them. 

Crystal is a vampire that has 7 brothers who are also vampires. She is the youngest in the family and she is very shy. She found a girl name Y/N that was looking around the area. She keeps a katana that she uses very well. Her brother are really scary to her and Y/N.