A game with prize money for a single mother and her family. While the single mother is challenging herself, the older sister and younger brother are playing a naughty game in another room to earn money for higher education..! In front of the mother through a magic mirror, the sister and brother, who are blood relatives, have a tearful and loving sex! They are so excited with each other that if they get into the habit of doing this, they will not be able to study for higher education!