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Shinmai Maou no Keiyakusha
По велению адской сестры ; 新妹魔王の契約者 ; 新妹魔王的契約者 ; 新妹魔王的契约者 ; 신 여동생 마왕의 계약자 ; Shinmai Maou no Keiyakusha (Testament) ; Shinmai Maou no Testament ; The Testament of Sister New Devil
"Hey, you said you wanted a sister, right?" First year highschool student, Toujo Basara, was suddenly asked by his father and fell into a state of panic. On top of that, the eccentric father told him he will be getting remarried. He then departed overseas after bringing Basara two beautiful step-sisters. But Mio and Maria's true forms are actually the newbie Demon Lord and a succubus!? Basara was almost entered into a master and servant contract with Mio, but a "reversed" contract was formed by mistake, and Basara is now the master!? Moreover, Basara is being hit by ecchi situation one after another due to the contract, but Mio's life is being pursued by other demon tribes and hero tribes!! The most powerful contractor's desire action drama begins!
- Vol.9 Pact After: The Toujou Family: Afterword
- Vol.9 Last Pact
- Chapter 39.5: Vol.9 Pact 39.5: [Side Story] Go With Maria
- Chapter 39: Vol.9 Pact 39: Return
- Chapter 38: Vol.9 Pact 38: A Score Settled
- Chapter 37: Vol.9 Pact 37: Runic Sword
- Chapter 36: Vol.9 Pact 36: Mio s Awakening
- Chapter 35.5: Vol.8 Pact 35.5: Behind The False Smile
- Chapter 35-P35: Vol.8 Part 35: The Results Of The Decision
- Chapter 34: Vol.8 Pact 34: The Demon Sword Gramr
- Chapter 33: Vol.8 Pact 33: Everything War For This Moment
- Chapter 32: Vol.8 Pact 32: Master
- Chapter 31: Vol.8 Pact 31: Basara Vs Maria
- Chapter 30.5 : Maria The Graphic Novelist
- Chapter 29 : Parting And Reunion
- Chapter 28.5 : The Testament Of Sister New Devil
- Chapter 28 : Betrayal And Connections
- Chapter 27 : Betrayal, And Then
- Chapter 26.5 : An Average Day In The Life Of Toujou Basara
- Chapter 26 : The Ups And Downs Of A Wavering Pact
- Chapter 25 : The Second Servant-Master Contract
- Chapter 24 : The Sexy Lil Succubus Rampage Part 2
- Chapter 23 : The Sexy Lil Succubus Rampage
- Chapter 22
- Chapter 21 : What A Man Belives In
- Vol.5 Chapter 20 : Time For A Reckoning
- Chapter 19
- Chapter 18 : Put Your Resolve On The Blade
- Chapter 17 : Before One s Resolve, The Things One Wants to Protect
- Chapter 16 : Their Fates Cross
- Chapter 15 : Gaze at the Past That Won t Disappear
- Chapter 14 : The Goal Of A Master-Retainer Relationship And Trust
- Chapter 13 : The Hostility Directed At Us
- Chapter 12 : Hold Onto Your Growing Feelings
- Chapter 11 : Unrivalled Morning Sister Demon Lord
- Chapter 10 : Things I Want To Protect
- Chapter 9 : Until You Are No Longer In Sorrow (Part 3)
- Chapter 8 : Until You Are No Longer In Sorrow (Part 2)
- Chapter 7 : Until You Are No Longer In Sorrow (Part 1)
- Chapter 6 : Enemies And Allies
- Chapter 5 : In Between Reunion And Trust (Part 2)
- Chapter 4 : Between Reunion And Trust
- Chapter 3 : The First Master-Retainer Contract
- Chapter 2 : Demon Lord And Hero
- Chapter 1 : How To Conquer Your Step-Sister
- Prologue