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.

Travel back in time to check out the early roles of some of Hollywood's heavy hitters. Plus, see what some of your favorite '90s stars look like now. See the full gallery. When a pair of sexy girls, Maria and Mio, come to live with high school student Basara Toujou, his life changes forever.

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Twelve volumes have been published by Kadokawa Shoten since under their Kadokawa Sneaker Bunko imprint. A second manga adaptation has been serialized in Hakusensha 's Young Animal Arashi magazine since February The first season of an anime television adaptation premiered on January 7, A second OVA episode was released on January 26, Basara Tojo is a high school student studying at Hijirigasaka Academy when his father Jin suddenly gets "remarried" and asks Basara if he wants to have sisters.