Summary
“Hey, you said you wanted a little sister, right?” Highschool freshman, 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 would be getting remarried. He then departed overseas after bringing Basara two beautiful step-sisters. Things aren’t as they seem in this series, as Basara discovers that his new “family” has a few secrets he’s yet to unveil.
Adaptation of the [Light Novel](https://www.novelupdates.com/series/shinmai-maou-no-keiyakusha/) series written by Uesu Tetsuto and with illustrations by Ookuma Nekosuke.
- Ch. 19 Unshakable resolve and its result 03/14/2025
- Ch. 18 Put Your Resolve on the Blade 03/14/2025
- Ch. 17 Before One's Resolve, The Things One Wants to Protect 03/14/2025
- Ch. 16 Their Fates Cross 03/14/2025
- Ch. 15 Gaze at the Past That Won't Disappear 03/14/2025
- Ch. 14 The Goal of a Master-Retainer Relationship and Trust 03/14/2025
- Ch. 13 The Hostility Directed at Us 03/14/2025
- Ch. 12 Hold Onto Your Growing Feelings 03/14/2025
- Ch. 11.5 A Day of Maria (Side StoryOmake) 03/14/2025
- Ch. 11 Unrivalled Morning Sister Demon Lord 03/14/2025
- Ch. 10 Things I Want to Protect 03/14/2025
- Ch. 9 Until You're No Longer in Sorrow (Part 3) 03/14/2025
- Ch. 8 Until You're No Longer in Sorrow (Part 2) 03/14/2025
- Ch. 7 Until You're No Longer in Sorrow (Part 1) 03/14/2025
- Ch. 6 Enemies and Allies 03/14/2025
- Ch. 5 In Between Reunion and Trust (Part 2) 03/14/2025
- Ch. 4 In Between Reunion and Trust (Part 1) 03/14/2025
- Ch. 3 The First Master-Retainer Contract 03/14/2025
- Ch. 2 Demon Lord and Hero 03/14/2025
- Ch. 1 How to Conquer Your Step-Sister 03/14/2025
- Ch. 0 Preview 03/14/2025