Magic User's Club (OVA)

The Magic User's Club, a group of students at Kitanohashi High School, takes it upon themselves to confront the alien robots that have invaded Earth. Known as the "eyeballs," these robots defeated the UN forces with ease and are now roaming the planet, observing human behavior. While they are generally polite and law-abiding, their presence still poses a threat to humanity, and the Magic Club sees an opportunity to prove their abilities.