If he is thinking about killing any Vampires just kill Elena , idc about her at all and she keeps showing up in either path.
As for Werewolves , this story update still wasn't enough to make me care about any of them.
It's just sad to see this game / VN get downgraded each new update , i used to be really enthusiastic for a new update , now any enthusiasm has died , i absolutely disliked the aliens storyline, and now the Vampires storyline is going somewhere i am not liking it either ( and that was my favourite storyline of the game).