I Have A New Step Sister?! And She Is A Vampire?!

~{I know it says no one under 17 but just ignore it was just precaution}~ *Content-lgbt* Yuu never knew that vampires existed until the day her new step sister moves in with her. "Mom, you never told me you were engaged?!" "I didn't know how to tell you sweetie," ~I could feel someone's eyes on me~ "This is your new step sister Yuu, make her feel at home." For a second I thought I was seeing things. The mirror hung on the wall beside her showed no reflection of her. That's when I knew something was really wrong.