A world where art becomes magic. In this world, people who can inspire passion with their Magic Arts are called Artistas, and are employed in show business. In Hoshinomori Private Magical Arts High School, where Artistas are taught, a strange new student named Kohana Aigasaki transfers into the school. Kohana is placed on the planning committee for the school's yearly Hoshinomori Summer Festa cultural festival. She spends her romantic school life with six other boys who aim to become entertainers in the future. Each of the boys specializes in his own Arts, and aims to make Hoshi Fes a success. In addition, the boys also aim to be chosen alongside Kohana as the school's Artista Prince and Princess, only chosen once a year. A Magic-kyun for you! A new renaissance starts here! Magic-kyun! Renaissance is a multimedia project where you can create great memories with Artistas of greatly varying personalities! (Source: Official site)

In ancient times, a great battle was waged between a master mage, Enno Ozuno, and an evil demon goddess, Karuma. Unfortunately, Enno didn't have the strength to defeat her alone and was forced to call upon Zenki, a powerful protector demon. After Karuma was defeated, Enno sealed Zenki away in a pillar located inside his temple. 1,200 years after this epic battle, Enno's descendant, Chiaki, spends her days showing tourists around her hometown of Shikigami-cho and doing exorcisms to pay the bills. One day, two thieves enter the town in hopes of opening a seal in the Ozuno temple and releasing the hidden treasure from within. However, what actually pops out is a dark entity that attaches itself to the henchmen, transforming them into demonic beings. After this transformation, they begin a rampage through the temple, terrorizing poor Chiaki. It is now up to this young progeny to unleash her family's powers to summon Zenki and save Shikigami-cho from these demons, as well as the evil entities sure to follow in their footsteps.

Running into your new stepsister in the bathroom is not the best way to make a good first impression, which Basara Toujou learns the hard way. When his father suddenly brings home two beautiful girls and introduces them as his new siblings, he has no choice but to accept into his family the Naruse sisters: busty redhead Mio and petite silver-haired Maria. But when these seemingly normal girls reveal themselves as demons—Mio the former Demon Lord's only daughter and Maria her trusted succubus servant—Basara is forced to reveal himself as a former member of a clan of "Heroes," sworn enemies of the demons. However, having begun to care for his new sisters, Basara instead decides to protect them with his powers and forms a master-servant contract with Mio to keep watch over her. With the Heroes observing his every move and the constant threat of hostile demons, Basara has to do the impossible to protect his new family members. Moreover, the protector himself is hiding his own dark secret that still haunts him to this day... [Written by MAL Rewrite]