Telepathy Shoujo Ran - 1x25 - Season 1, Episode 25- Followmy.tv

When they arrive at school, Ran and Midori find their teacher Ueda who falls from a tree and was injured by a leopard. Similar attacks have been happening around town, and school is canceled for the time being. Ran, Midori, and Rui investigate further by going to Junpei's house and find him and a tiger in his house. Junpei tells them that the tiger is actually his brother, and shortly after Junpei turns into the same leopard from before. Ran, Midori, and Rui head to the school's old beech tree to find a group of the transformed human animals and their old teacher Momoko. The Great Mother, actually a very old wolf spirit named Ōgami, is also there, and explains to Ran and Midori that once humans lived in harmony with animals, but now they must be eradicated.