Casa Clubs, Jo Diamonds, Coco Hearts and Sunday Spades make up the Crown Knights -- a card wielding team of deadly females who make it their business to stop crime and keep harm from happening to their kingdom! The beautiful vixens' ability will be put to the ultimate test when a pair of black and white mechanical chess pieces invade the tranquillity of their home, destroying everything in their path! Can the girls defeat the oncoming behemoths before it's too late?
At the St. Ignacio School for Girls, there are two prestigious groups: the Debutante Club, led by the beautiful and evil Sayaka, and the not-so-popular Etiquitte Club, its sole rival. Shihoko Sakaki, Saori Tachibana, and Kanami Ezaki are three freshman who join the Etiquette Club, not knowing that it is a cover for an elite fighting squad known as the Exstars! While piloting the mecha Battle Skippers, they fight crime, justice, and Makuhari Heavy Industries (run by a relative of Sayaka) to keep the world safe. Watch out, bad guys! The Exstars are on the prowl!
Life on Earth was changed forever when the SE, the Space Emigrants, invaded. Now, the human population has been driven underwater, and hides in the shelter of aquabases deep at the bottom of the sea. With time running out, humanity launches its final attack, and best weapon: the Angels. These cybernetic women are humankind's last hope of survival against the invaders.