Dokuzetsu Cool na Imouto o Seiteki ni Kawaigaru! ~Nii-san no Hentai, Do Hentai! Sekinin Totte Haramasete yo ne!~

My little stepsister is perfect in every way: scholastic, athletic, and a great homekeeper. She's also cool and dismissive and brazenly self-interested... I can't help having fantasies about her... fantasies that I never thought would come true until I saw her in her bedroom. She was huffing a pair of my dirty pants!

[From DLSite English]