The protagonist, Yamashiro Koyomi, had graduated university and undertook the teacher employment exam in order to become a high school teacher, her dream job. However, her attempts had constantly ended up in failure. "Maybe I'm not fit to be a teacher?" As the protagonist thought this and was about to give up, she had finally received a report indicating that she had passed. Her heart leapt at the thought of her new life as a teacher. The school that had employed her is located in the 48th prefecture of Japan known as the Aima Prefecture, and is a training school designed to educate inexperienced UMA so that they can become fully-fledged UMA. In fact, Koyomi had accidentally undertaken the "animal trainer" employment exam instead of the "teacher" exam! "This is impossible for me," said Koyomi, as she was about to decline her offer of employment. In response to this, the school's principal promised, "if you can can work admirably for us for one year, I'll put in a good word for you to other high schools." Having no experience whatsoever in the art of training, will Koyomi be able to train an UMA? Also, will she be able to assist in the growth of an inexperienced UMA into an excellent one? For the sake of being able to transfer to a different high school- though filled with her doubts- Koyomi's year-long life as a homeroom teacher-cum-"animal trainer" will begin!