Risky flirting game with stepniece-in who came to Tokyo from Hakata - Mizuki Yayoi

Mizuki has enrolled in a college in Tokyo, aiming to go to a prestigious university. However, she is asked to stay at a older guy's house until the renovation of the dormitory where she was supposed to live is finished. Despite her seriousness, she is very interested in sex. She asked him, "Can I stay here forever? So we can have sex every day..."