Rosario Vampire, Volume 3 (Rosario Vampire Vol. 2 #9-12)

Koko follows the trail of a mysterious prankster monster that has been terrorizing the girls on campus. She suspects Ginei Morioka the werewolf, but Gin reveals the true culprit. Mizore takes the gang to her Snow Fairy world where she is to participate in a coming-of-age ceremony. She isolates Tsukune and tells him that she wants to be with him, but is carried away by the Snow Oracle where she is arranged to be married to Miyabi Fujisaki, who couldn't care less about her feelings and wants. Tsukune and the other girls try to rescue her with Mizore's mother's help.