Etotama (Manga)

is a Japanese manga series written by Tooru Zekuu and Takashi Hoshi and illustrated by Hiroma Hino. The manga was serialized in the Dengeki Daioh magazine and published in Japan by ASCII Media Works under the Dengeki Comics NEXT imprint from June 2013. The series is based on the 2015 Studio Shirogumi anime series of the same name.

Synopsis
Since ancient times, Japan has upheld the tradition of the 12 Zodiac signs. Eto-musumes (Zodiac girls), who have the appearance and behavior of the animals of the Zodiac, are pure-hearted messengers who act as a bridge between humans and the gods. Every 60 years, the "ETM 12" tournament takes place in Tokyo's Akihabara district, where aspiring girls from all over Japan gather for the chance to become the next zodiac sign. One of those girls is Nya-tan, a catgirl who was tricked by a sneaky rodent and was not able to become a Zodiac girl. There is only one condition to become an Eto-musume: you must defeat the other 12 signs. But with strength bestowed to them from the heavens above, no one has been able to defeat them for 2000 years. The story begins when Nya-tan meets Amano Takeru!

(Source: Manga Updates)