Rosario to Vampire

Synopsis

While on summer vacation in the human world with Nekonome as their chaperone, fun in the sun on a beach for the Newspaper Club gives way to a field of sunflowers on a hill that Tsukune discovers. He does not realize that there are a pair of witches residing there that make no distinction between them and the land developers that covet that area. Feeling left out by the others due to her young age, Yukari encounters Ruby Tojo later that night, pleasantly surprised to see another witch. As Yukari is pondering whether to join Ruby and her guardian, later recognized as Lady Oyakata, Tsukune arrives to escort her back to the others. Ruby tries to attack Tsukune with plant monsters, but Yukari slices them to pieces. Just as Yukari leaves with the others, Ruby critically wounds Tsukune, giving Moka, Kurumu, and Mizore the incentive to fiercely attack Ruby.

(Source: Wikipedia)