Meh, I stand by my last chapter comments that I don't think it'll happen.
But I still think the author handled this pretty badly. I think the idea to the mangaka was that the teacher "sacrificed" herself to play the bad guy, knowing that she'd be blamed for not telling them, but feeling it was necessary ... somehow ... to save the vamp girl ... for some reason....
... except that the author made a complete mess of the entire thing and I really have no sympathy for anyone involved here.
Plus, some random bits thrown in like this shady organization which is in it for money (am I supposed to cheer for them?) and this super-dramatically-convenient-setup (which works apparently precisely for one vamp<->one girl; do they have to have one bride? What happens if the effects are spread out over multiple victims? Why not give them blood from a blood bag instead of a live person? What about dialysis?) and so on.
Maybe it's just one chapter that didn't work quite so well, but experience tells me that once authors misstepped like this usually they don't manage to save their stories (at least to my tastes, not saying someone else might not enjoy it ^^; )