Nozoki Seikatsu ~Bijin Oyako no Ana to Ana!~

Spying on women's secrets!
The hero brought up in the city, lost his mother a few years ago, and moved to the countryside to his father and his sister.
After graduating from school, the hero begins to help his father, continuing his work, and, ultimately, inherited his property.
And so begins the summer. Suddenly, the father's sister and her daughter, who lived in the United States, return. They asked for some time to live with the hero.
Both mother and daughter have beautiful bodies and big breasts, because the hero quickly becomes fascinated by them.
"I want to look more at this body! I want to see that part of the mystery that was hidden! I want to know more and more about women!"
This means that the desire pushes the hero to "look"! Check out a game with a similar genre kanobitch ~kanojo ga bitch ni natta riyuu~.