Ouritsu Nekomimi Gakuen ~Anata no Tame no Hatsujouki♪~

There is a mysterious school far to the east that is attended by students and teachers with animal ears. These are fake ears, but it's an important tradition of the school. But protagonist recognizes in a new transfer student a real half-human girl. He gets culture festival executive committee member position to get to know various student girls better.

[From vndbreview]