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.

Himawari Hinata recently transfered to Shinobi Gakuen to train to become the best kunoichi she can be. She wanted to be a ninja ever since she was saved by one when she was little. On her first day, she meets Hayato Madenokoji (a new transfer teacher) who saves her life. Hayato does not possess any ninja skills or traits, he is teaching the ninjas about normal society to pay off his debt. However, Himawari notices that Hayato bares the same mark on his neck as the ninja who saved her when she was young. (Source: ANN)

While searching through his grandfather's attic, Hikaru Shindou stumbles upon an old go board. Touching it, he is greeted by a mysterious voice, and soon after falls unconscious. When he regains his senses, he discovers that the voice is still present and belongs to Fujiwara no Sai, the spirit of an ancient go expert. A go instructor for the Japanese Emperor in the Heian Era, Sai's passion for the game transcends time and space, allowing him to continue playing his beloved game as a ghostly entity. Sai's ultimate goal is to master a divine go technique that no player has achieved so far, and he seeks to accomplish this by playing the board game through Hikaru. Despite having no interest in board games, Hikaru reluctantly agrees to play, executing moves as instructed by Sai. However, when he encounters the young go prodigy Akira Touya, a passion for the game is slowly ignited within him. Inspired by his newfound rival, Hikaru's journey into the world of go is just beginning.

In the future, water has covered much of the Earth due to the effects of global warming. The orphaned Maia Mizuki, 15, just graduated from middle school and has already applied for employment in the elite paramilitary Ocean Agency, part of the futuristic world government. Only the best, most intelligent, and physically fit students are eligible for admission. Maia, the series' protagonist, is set to become one of the few. But her ideal life quickly falls apart. To her disappointment, Maia unexpectedly fails her entrance exams. Making matters worse, she promptly gets evicted from her house, pick pocketed, taken hostage, then shot. She is saved by two women (Rena and Shizuka) that are part of an unorthodox help-for-hire organization called Nereids (inspired by the Greek mythological Nereids ). With nowhere to go, Maia joins up with Nereids, taking jobs from capturing wanted criminals to chasing stray cats, often with unexpected results. Gloria and Yu later join up with Nereids. Daphne in the title refers to a subplot that starts midway into the series and eventually become important to Maia. Brilliant Blue refers to the fact that this is a world covered by water with almost no land. The world consists of vast oceans, a few islands, and floating cities. (Source: Wikipedia)