Mai☆MAI Funifuni Papyuun to Iwasecharu!

Mai is a little girl with cat ears who studies the art of magic. Unfortunately, she doesn't always do her homework, and sometimes loses control of her magical powers. This is precisely what happened one day, when she accidentally unleashed a magical spell upon terrified classmates. Now the poor girl is being hunted down by male and female students, teachers, and other people, and she has to fight for her life while perfecting her magic-casting skills.

[From MobyGames]