グラムキャッツ

High school girl Sayaka is kidnapped by the secret organization Eagle (Earth Defense Force) on the way back home. According to the organization's commander, Sayaka has a special ESP that can help fight against aliens. Sayaka acquires a supernatural ability to transform into a cat and her first mission is to infiltrate Momozakura student Academy which is a base of alien forces.

[From vndbreview]