Oji Tanaka has a wife, a child and a mundane job as a salary man in Tokyo's modern society. But life wasn't dull for him to begin with; 15 years ago, he was known as "Gabriel", leader of a short-lived heavy metal band called Black Heaven. Oji's life gets a sudden change in direction when he is invited by a mysterious blonde woman named Layla to pick up his Gibson Flying V and once again display his "legendary" guitar skills, not knowing that his music generates power for a massive weapon in an intergalactic war. (Source: ANN)

The Fairytale World is in trouble. Its princesses and their respective worlds are disappearing, causing a ripple effect in the human world where their stories are popular. In order to save the Fairytale World, the Queen sends three magic animals, Sei, Dai, and Ryoku, to the human world with magic gems to find three girls who can become the "Super Miracle Idols," the princesses Snow White, Cinderella, and Kaguya-hime. Those "princesses" end up being three little girls: Yukimori Ringo, Takashiro Layla, and Sasahara Natsuki. But the gems transform them into older singing superstars, and after their accidental debut at the singer Wish's concert, they become known as "Little Princesses," or "LilPri." Now they must collect Happiness Tones from humans in order to restore the Fairytale World.

After years of fruitless war between the four realms of Gamindustri (Planeptune, Lastation, Lowee and Leanbox) over Share energy, the source of their strength based on how much their people have faith in their goddesses, the four CPUs that rule over them have finally signed a friendship treaty. The treaty bans any attempt at claiming Share energy through military force, in hopes of bringing peace and prosperity to their worlds. Yet, a month after the treaty, Neptune, the CPU Goddess of Planeptune, spends her time goofing off and playing games rather than doing her job, leaving her land's Shares plummeting. Choujigen Game Neptune The Animation follows Neptune and her friends' attempts at raising Shares, while dealing with an external threat that could spell the end of both the Goddesses and Gamindustri itself...

While searching for a run-away cat the twins Riko and Rimu Mikogami find a strange device that transforms them into "Kirumin." It also enables them to turn into real animals. Their older sister Nagisa soon joins them. Now the three have cute, funny and sometimes dangerous adventures.