When Satsuki is nominated to become the Anime Caretaker for her class along with Mio Imai her classmate, she gets a taste of what it's like to get up early to clean up after the animals.  When a new rabbit appears things start to get strange, especially when the rest of the rabbits are killed one night.  Can Satsuki figure out what's wrong and how does Mio Imai fit in to all this?