Kanojo no Imouto to Himitsu no Stay Home -Uchiki Musume ga Haitoku Netori!- by Appetite - Adult Sex Game

Sayoko Amafune and Yutomo Harase started living together for marriage.
At that time, Sayoko's parents' house was remodeled, and her parents decided to move to a rent near the place of employment.
However, Sayoko's younger sister Emi is far from her school, so she will live with Aritomo's house near the school for a limited time.

I'm not good at socializing, and there are some gaps.
At first she didn't greet Aritomo and didn't speak, but over
time she got rid of her moody appearance.

And one day like that.
When I was working side by side, I pretended to be her coincidence, but she clung to her tomo and entwined her legs.
And awkward, but somehow seductively, staring at Aritomo.