At just 8 years old and in grade school, Mao Onigawara holds the position of Chief of Staff of the Ground Defense Force's granddaughter and is quite happy with her life. While her cloverleaf-shaped badge doesn't actually give her any superpowers, it does provide her with the ability to transform. Teaming up with her two besties, who both happen to be granddaughters of the Air and Marine Defense Force's Chief of Staff, Mao is determined to safeguard Japan against the "cute aliens" that can't be countered by the regular military due to their irresistible charm.