To save the Earth from alien invaders and their giant monsters, Dr. Kishida does what any other red-blooded mad scientist would do: he builds a giant robot—the ultimate feminine fighting robot! Unfortunately, his grand-daughters refuse to pilot it! Apparently, they've got more important things to do than becoming teenage super-heroes. Besides, how are you supposed to study for your college entrance exams while getting beaten-up in battle? Fortunately for Dr. Kishida, things aren't too well for the invaders, either. According to their reports, the Earth was the perfect target: lush, peaceful, and relatively defenseless. Theoretically, the planet should've surrendered long ago. Now, the war is at a standstill, the dreaded Accounting Department is warning about the serious cost overruns, and the head of the home office has arrived from Galactic Headquarters to personally oversee operations. Has Headquarters decided to unleash, The Audit—or do they have something even more evil in mind? The fate of the world rests upon two people: Aya Kishida, one of the doctor's granddaughters, who may have to give up prep school to pilot the mighty (and lovely) ARIEL; and a mysterious alien named Saber Starblast, who may have the power to defeat the invaders once and for all...

Those incompetent aliens are still plotting to conquer the Earth! The only obstacle in their path is the giant, feminine robot ARIEL! But the young pilots have lives of their own... When Kazumi receives a mysterious love letter from a secret admirer, should she cancel her first date just to save the Earth?

The story takes place in Tokyo Butei High School, a special school where armed detectives—"Butei"—are trained to use weapons. Kinji Tooyama is a second-year-student who has a special ability, but he keeps it a secret to maintain an ordinary, peaceful life; however, when he gets caught in a bombing on the way to school, he encounters H. Aria Kanzaki, the most powerful S-Rank Butei student in Assault Studies.

After failing their boss for the last time, yakuza members Kentarou, Ryou, and Kazuhiko are faced with one of two choices: have their organs harvested and sold or take a trip to Thailand for sex reassignment surgery and become pop idols. Now, after a year of excruciating training, the three thugs have been reborn as Airi, Chika, and Mari. Debuting as the amateur idol group The Goku Dolls, the three strive towards becoming top idols. However, despite the hours of feminizing brainwashing they were forced to endure, the three idols have managed to keep the yakuza spirit alive in their hearts. In order to fix this, their yakuza boss hires Mandarin Kinoshita, a legendary manager who has never had an idol group fail under his management. With their lives now on the line, the reluctant yakuza must work with their new manager to unleash their inner cuteness and become the successful idols that their tyrannical boss can truly be proud of. [Written by MAL Rewrite]