The ancient kingdom of Parros has been invaded by the armies of Mongaul, and its king and queen have been slain. But the "twin pearls of Parros," the princess Rinda and the prince Remus, escape using a strange device hidden in the palace. Lost in Roodwood, they are rescued from Mongaul soldiers by a strange leopard-headed man, who has no memories except for the words "Aurra" and "Guin," which he believes to be his name.

One day, the bright red sun stopped shining, causing the "Breakdown Phenomenon"—the destruction of Arata Kasuga's town and the disappearance of the people inhabiting it. All, however, is not yet lost; by utilizing the magical grimoire given to him by his childhood friend and cousin Hijiri Kasuga, Arata's world gets artificially reconstructed. In order to investigate the phenomenon, Lilith Asami appears before Arata, whose artificial world suddenly disintegrates. He is given two choices: hand over the book, or die. However, Arata chooses the third option—enrolling in the top-secret magic school Royal Biblia Academy, where six other magical users await him. Together with Lilith, these six form the Trinity Seven, the elite of the school who each bolster their own power and skill. With the ambition to save Hijiri and the help of his newfound friends, Arata stops at nothing to prevent the destruction of his beloved hometown and to bring his best friend back. [Written by MAL Rewrite]

The main character, Ranze, is a junior high girl with troubles: her father is a vampire and her mother is a werewolf. Ranze has yet to manifest her supernatural powers, and her parents are beginning to get worried she might be normal. So begins the fantasy romantic comedy story. (Source: ANN)

As the Holy Empire rises to power, the neighboring lands begin to gradually fall under its control. The Empire's conquest eventually reaches the small island of Erin, home to the Gael tribe. There, a priestess named Riannon is kidnapped to be offered as a living sacrifice to the demon king Arawn, a malevolent being rumored to have caused untold destruction in the past. Riannon's brother, First Warrior Arthur, rescues her, when Arawn suddenly materializes before them as a handsome grey-haired man. Hiding his true identity and remaining enigmatic, Arawn pledges his power and leadership to the tribe's cause and joins Arthur, Riannon, and their merry band of friends—including a talented swordsman, an agile hunter, and a group of ecstatic pixies—as they fight back against the Empire, while uncovering the dark secrets of the land along the way. [Written by MAL Rewrite]