To prepare well for the upcoming university entrance exam, the younger brother asked his parents' permission to go to the city to stay at his older brother's house for a few months with the hope of being tutored by his older brother's girlfriend, a beautiful, talented girl who is currently a student at a famous university. The older brother is very kind, always reminding his girlfriend to tutor him regularly while his girlfriend dresses very revealingly and airy at home, especially when teaching. Many times he had to try to control his little boy after accidentally seeing his older sister's sensitive area.