Eto-shin(zodiac god).Eto-shin is the name of the 12 divine messengers chosen from within “Eto-musume,”or girls representing animals.From ancient times, these 12 divine messengers have protected the land of the rising sun.They are powerful beings who have survived through “ETM 12,” a divine tournament held every sixty years, and is admired by all Eto-musumes.Fast forward to now, the present day, and the year ETM 12 will be held.From all over Japan, Eto-shin candidates, or in other words, Eto-musumes gather in great numbers.Within that group exists a single cat Eto-musume.Her name is Nya-tan (nya, as in meow). She is thought of as the one closest to becoming an Eto-shin,but is a misfortunate girl who always ends up undermined by evil rodents every time.There is only a one way to become an Eto-shin; to beat all 12 zodiac animals. However, the powers of the Eto-shin are great, and there hasn’t been a single Eto-musume who has won in the past two thousand years.When Nya-tan meets an ordinary high school student, Takeru Amato, the story begins!