Binetsu Kuukan

Vol.4 Chapter 21
Vol.4 Chapter 20.5
Chapter 21.5.1
Vol.4 Chapter 20.5
Chapter 21.5.1
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.
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