Looking for vampire manga! Please help!

Hey,

I remember reading a manga on mangago but I can't remember the name. The girl is a college or high school student and she fell in love with a vampire hybrid (half-human). I remember that she's older than him. I also remember that he tries to stay away from her to keep her safe but ends up saving her when her teacher tries to rape her. I think the vampires' eyes also turn black when they smell blood. Thanks!