My sister is deprived by my brother (Volume 1 whole volume)

Publisher: Bunkha
Author: Pico Piko
Size: 112mm x 174mm
Number of books: 1
Language: Japanese
Category: Female manga, manga
Latest release date: 2015-10-29

Synopsis:
Haya, who has been in inferiority compared to his younger sister, Yukino, has been in inferiority. Three months later, she knew that Yukino would get married, and the darkness of Hayao's heart swelled greatly. "Let's do the worst thing when my sister is the happiest." Now, a nasty forbidden × revenge on my sister begins ...! !