Amayakase Kanojo no Iru Seikatsu -Ichizu na Ginpatsu Bishoujo wa Suki Desu ka?-

You are a company employee who finds a beautiful girl sitting outside his home. She’s your niece, Anya. She tells you that her mother went on a trip overseas and that she was told to come and stay with you—it’s dangerous to live alone! In exchange for letting her live with you, she offers to help with the chores, prepare meals, and to give you a lap to lay your head on when you get home from work, just like a diligent newlywed wife would.
You become more calm thanks to her, but that’s when certain “thoughts” start racing through your mind. Eventually, you can’t resist your excitement any longer, and when you decide to take care of your “needs” in private, she walks in on you, and...