Failed reincarnation as the sister of the mastermind murderer of the Death Game manga (vol. 1-5, latest issue)

Publisher: KADOKAWA/ Ascii/Media Works
Author: Pepu, Inaida Sou
Size: 128mm x 182mm
Number of books: 5
Language: Japanese
Category: Women's Manga,Cartoon
Latest Release Date: 2024-03-22

Synopsis:
A summer colored by madness and boredom. I'm the only one who knows who my brother really is...

Mai, who has a perfect brother-in-law, has dreamed of marrying her brother since she was a little girl. and has dreamed of marrying her brother since she was a little girl.
However, one day, she found out that her "brother is a character from a death game manga, and a year later, he held a death game involving her classmates.
In the process, he kills his younger sister, Mai.
Based on her brother's comment in the manga, "Everything is predictable and boring," Mai predicts that if she saves him from boredom, the Death Game will not be held.
She plans diverse surprises for her brother every day, but with each passing day, her brother-in-law begins to show signs of bizarre .......

-Mai will now be able to love me so that I can love her, so that we can live together.
We're going to work a lot--