is a 1986 Japanese animated science fiction action comedy film. The film focuses on 16-year-old Japanese teenage schoolgirl A-ko, who defends her best friend C-ko, as they face off against their fellow classmate and rival B-ko while the Earth faces the threat of an alien invasion. It was directed by Katsuhiko Nishijima with Yuji Moriyama did animation direction and character design. The film project initially started as part of the Cream Lemon series of original video animation, but later became its own film. The film staff said they were motivated to produce a fun exciting film in contrast to the more serious anime films being produced at the time. Additionally, the film includes a variety of references and parodies a number of other works of anime from the 1970s and 1980s.

Plot

An alien spaceship crashes into Graviton City, wiping out the entire population and leaving a massive crater where the city is rebuilt 16 years later. High school students A-ko Magami, a perky, fun-loving red-haired, sailor-suited teenage girl, and her best friend C-ko Kotobuki, a bubbly, carefree optimist, enter a new year of school as transfer students at the all-girls Graviton High School. Although A-ko possesses superhuman speed and strength, she considers herself an average teenager. She mostly worries about getting to school on time, due to her habit of chronically oversleeping her alarm clock each morning. The pair catch the unwanted attention of B-ko Daitokuji, a rich, snobbish, spoiled, and brilliant fellow student.