Is Peter Constellation an anime? What is the main content? Who is the protagonist?

It mainly happened in Xingyue Academy, which used to be a boys' school. In recent years, girls have been recruited. But because the school is remote and the teaching is too professional, until now, there is only one girl in Xingyue Academy, Yahisa Tsukiko. The story is the story of Confucius as the host, and the love story of 13 boys with different personalities and characteristics in the 12 constellation (actually there is a Ophiuchus).

The heroine is Yahisa Tsukiko.

The leading men are Yoh Tomoe (Capricorn), Nanami Kanata (Pisces), Suzuya Tohzuki (Cancer), Homare Kanakubo (Taurus), Ryunosuke Miyaji (Scorpio), Kinose Azusa (Sagittarius), Yueyue Torataro (Libra), Haruki Naoshi (Leo), Shuidaoyu (Gemini), Eagle (Aquarius) and Ignorant Fire Tree (Aries).