Season 1
13 episodes
25 min. per episode
Where to watch
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A high schooler navigates a dangerous world of demons and desires, torn between loyalty to family and survival.
Episodes
After Toujou Basara's father remarries, Toujou gains two step-sisters named Maria and Mio.
In a strange twist of fate during a Master/Servant ceremony, Mio becomes Basara's servant which takes a sexual act to seal. During the first day of school with Mio, Basara runs into an old childhood friend.
Things heat up at school when demons sense Mio's presence, followed by Yuki threatening her. Mio learns more about Basara's past.
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Basara's morning starts with Maria in his bed, followed by Mio and Yuki in the bathroom. The hero clan upgrades Mio's status to kill.
First-year high school student, Toujo Basara, was suddenly have two beautiful step-sisters adopted by his father. But Mio and Maria's true forms are actually the newbie Demon Lord and a succubus!?