The Testament of Sister New Devil
TV animeOVA2015–20182 seasons23 episodesOriginal: light novelTetsuto Uesu
Toujou Basara is a high school student whose father has suddenly just remarried. His father then departs overseas leaving Basara with two new beautiful step-sisters. Little does he know, his new sisters, Mio and Maria are actually the new Demon Lord and a succubus!? Almost trapped into a life of servitude, Basara forms a reverse contract by accident and ends up becoming Mio's master! Hijinks ensue as Basara finds himself in one ecchi situation after another. However, Mio's life is in danger as she is pursued by demons and heroes!
After The Testament of Sister New Devil: Departures, continue with Vol. 9

Season 1
- Anime ends at
- Ep 12Original: Vol. 3
- Read next
- Vol. 4light novel · Japanese · Kadokawa
The anime’s continuation point is Vol. 4 of the original. This is the book that contains it.
新妹魔王の契約者IV
KadokawaJapanesePaperback
Where it stops:
1 side entryOVAreading notes
- The Hard, Sweet Daily Life of Toujou BasaraOVAFor this bonus episode bundled with light novel volume 8, the next light novel to read is still unconfirmed.

Season 2
- Anime ends at
- Ep 10Original: Vol. 7
- Read next
- Vol. 8light novel · Japanese · Kadokawa
The anime’s continuation point is Vol. 8 of the original. This is the book that contains it.
新妹魔王の契約者VIII
KadokawaJapanesePaperback
Where it stops:
1 side entryOVAreading notes
- The Very Peaceful Daily Life of Toujou BasaraOVAFor this bonus episode bundled with manga volume 7, the next light novel to read is still unconfirmed.

The Testament of Sister New Devil: Departures
- Anime ends at
- Ep 1
- Read next
- Vol. 9light novel · Japanese · Kadokawa
The anime’s continuation point is Vol. 9 of the original. This is the book that contains it.
新妹魔王の契約者IX
KadokawaJapanesePaperback
All 5 books from Vol. 9 to Vol. 13
- Vol. 9新妹魔王の契約者IXBuy on Amazon
- Vol. 10新妹魔王の契約者XBuy on Amazon
- Vol. 11新妹魔王の契約者XIBuy on Amazon
- Vol. 12新妹魔王の契約者XIIBuy on Amazon
- Vol. 13新妹魔王の契約者XIIIBuy on Amazon
Where it stops:
Original · Light novel
The Testament of Sister New Devil
新妹魔王の契約者
Tetsuto UesuKadokawaCompleted13 volumes
- JapaneseKadokawa13 volumesSep 2012 – Mar 2021
All volumes
Before you read
Suggested reading (Japanese · Kadokawa): Season 1 ends at Ep 12. Continue with Vol. 4.
Suggested reading (Japanese · Kadokawa): Season 2 ends at Ep 10. Continue with Vol. 8.
Suggested reading (Japanese · Kadokawa): The Testament of Sister New Devil: Departures ends at Ep 1. Continue with Vol. 9.
The original light novel is complete in 13 volumes.
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