Tatakae!! Iczer-1

Nagisa is a typical schoolgirl with a routine of waking up late and hurrying to school, often meeting friends along the way. One morning, she encounters a woman in an unusual uniform who unsettles her with an intense gaze. Later, while looking out the window, Nagisa notices a ball moving on its own, which crashes through her window without injuring her. As she turns around, she sees a mouth filled with teeth very close to her face, with no one else nearby. She lets out a scream, after which everything appears normal again. Her classmates gather around, curious about why she screamed.