The Testament of Sister New Devil

- Season 1

(2015)

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.

Basara and his sisters prepare for their fight with the hero clan.

The hero clan and the demon clan battle with some surprising twists.

Yuki wants a master/server pact with Basara, like he has with Mio, which only grows stronger when Basara and Mio have an encounter in the girls change room.

Basara and Yuki begin the ceremony to form their pact. Clad in a bustier and garter belt, Yuki was raring to go for it. But when she refused to forge the pact normally she fell victim to the same succubus curse as Mio!

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Basara and then his sisters take on Zolgia, when he is injured the true form of the building they are in reveals itself to be a creature, resulting in them being trapped inside it's belly.

The final battle takes place within the belly of the beast as Lars and Zolgia look on from a distance.

Another morning at the Toujou household: Maria sets up a special succubus camera that can capture the target's dream, in this case Mio's. After putting an end to Maria's blatant breach of privacy, Basara then tests Maria's latest cooking experiment which turns out to be strangely perverted. Yuki is not phased by any of this, and when Mio finally wakes up the innocent Basara falls victim to her outburst. The school nurse, Hasegawa Chisato, is wearing a new swimsuit and the zipper is stuck. She asks Basara to help her unzip it.