On a stormy night, Senbei Norimaki is in the middle of creating an attractive teenage maid android to serve him, but lightning hits his house, causing his machines to malfunction and insteads creates a weird, short, near-sighted girl named Arale. / Arale starts her first day of school while Senbei meets her teacher, Miss Yamabuki, whom he falls in love with. At school, the kids find out about Arale's strength and everybody wants her to join their clubs.