Binetsu Kuukan

Chapter 15
Vol.3 Chapter 14.6
Chapter 15.5
Vol.3 Chapter 14.6
Chapter 15.5
Akasegawa Naoya's mother remarried recently and he suddenly finds himself trying to get along with his new big sister Amane, a student of the prestigious Kasugano Girls' School. But his new big sister isn't like what you might first expect.