Is this sum radiation surge?

Chairman Cross has Yuuki and Zero bind some sort of blood contract. Used in ancient times by vampire hunters to control vampires, Yuuki needs only touch her bracelet to Zero's neck to immobilize him. (Oooh, S&M play~) The next day, Cross Academy receives a new ethics teacher, Yagari Touga. Not like obviously a vampire hunter, or anything.

Later, Zero and Yuuki head out for some fun in the town, but Zero is irritated by the waitress and bolts. Yuuki goes looking for him, but as expected finds none other than another Level E vampire. (Honestly, conditional learning. Going into town = bad.) Zero shows up to ward off the vampire, but ultimately Ichijou (who is there with Shiki) kills it. Ichijou tells Yuuki and Zero to  come by the Moon Dorms later.

That night, Yuuki and Zero walk into a nest of vampires, as Ichijou is holding a birthday party. Kaname makes it clear that Yuuki is his girl, much to Zero's distaste. As the party continues, the  vampires engage in various bloodletting/feeding (whatever, same thing) activities, and a sickened Zero runs off.

Yuuki goes after Zero, and she realizes that he's unable to take the blood tablets, since he's not a real vampire. He's about to feed on her when she pulls both of them into the lake, bringing him back to his senses right as he gets shot in the arm. The two look up to see none other than the ethics teacher, whom Zero refers to as 'master'.

Thoughts:
Oh wowow. They're really following the manga. I know I've said this a lot but each episode just reinforces it.
Oh, in Episode 3 I mentioned that there should have only been one vampire and members from the Night Class eliminated it - whoops my bad, it was in this episode. I don't quite recall there ever being a woman and child vampire though. Eh, maybe in conjunction with this latest vampire, they used to be a family, or something. lols. Okay actually that's pretty depressing. :<
Well, since Zero cannot take blood tablets, how's he going to meet a growing vampire's needs? Then there's the whole obstacle of his former vampire hunter master knowing that he's become a vampire… poor Zero.