Love you didn't expect

Its a yandere story of a vampire Leanne Yasuhiro and a detective Shuichi Saihara (Saihiro)
Leanne goes to a new school, but she has to keep a secret. The secret that she is a vampire. And at that day she met a guy named Shuichi Saihara. And got an crush on him. One day Leanne got jealous, because some girls are hanging around with her crush. The next day Leanne invites one of the girls (Kaede Akamatsu) to come to her house after school... once she arrives at Leanne's house... she got surprised... everything around her became black. And she woke up in a basement she tried to escape... but she couldn't.