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13 Episodes
S1 E1 - The Day I Got A Little Sister
S1 E2 - First Contract Between Servant And Master
S1 E3 - Reunion and a Gap in Trust
S1 E4 - Until Sadness Reaches Zero
S1 E5 - A Little Sister's Morning Demon Lording
S1 E6 - Bearing Growing Emotions
S1 E7 - The Depths of Love and Hatred
S1 E8 - Erotic Succubus Out of Control
S1 E9 - Merits and Demerits of Master and Servant
S1 E10 - Plaintive Betrayal
S1 E11 - Epsionage... What Lies After
S1 E12 - For This Night, This Moment
S1 E13 - Episode 13
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Synopsis
When Basara Toujou's 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...
