Rosario Vampire, Volume 1 (Rosario Vampire Vol. 2 #1-4)

Tsukune Aono and the monster girls that like him start their second year at Yokai Academy as classmates. Yukari Sendo fashions an object that frees Moka Akashiya's inhibitions towards Tsukune. During the class self-study periods, Shizuka Nekonome takes Tsukune and the girls to a nearby area where they hunt monster durians. Tsukune meets new student Koko Shuzen, who is Moka's younger sister and who wants to fight the real Moka. When the News Club investigates a series of attacks on students, the trail leads to an underground dungeon area where Tsukune and Moka are ambushed by bandits.