Since some people may have gotten confused this is what's happened so far:
Yukari used the RD on Tsukune A and he gets replaced with ghoul Tsukune B. Tsukune A, who is sane, defeats Midou and the other monstrels. Tsukune then tells past Moka, Kurumu, Yukari, and Mizore that he is from the future.
Yes it was ooc for Tsukune A to say he would kill the monstrels if they left. Sorry I just get really excited when I am writing stories and forget how the character really is. Now head over to the next chapter to continue with the story.