[Light Novel] How long do you think you are a "convenient sister"? ~ A genius and a genius who has been oppressed enjoys the second life ~ (one book)

Publisher: Starts Publishing
Author: Ayamori Katayama
Size: 128mm x 188mm
Number of books: 1
Language: Japanese
Category: Light novel
Latest publication date: 2024-01-05

Synopsis:
Ellie has been oppressed by her sister of tyrant since she was young.
As an adult, I was desperately doing the work of magical power while being used in the workshop run by my sister,
Finally, he falls down at the limit of magical power and is abandoned as "I don't need it."
Ellie was desperate, but was picked up by the Duke who accidentally visited and helped her as an assistant.
Ellie does unknowingly doing difficult grants one after another and generously demonstrate their power.
On the other hand, my sister couldn't give a simple magic stone, and was in a difficult situation ...?!?
You don't have a convenient sister anymore, right?
A big reversal, in which an incompetent girl grabs happiness with her own hands!