GVG-292 — My Sister's Real Sex Education

During spring break, Harura and her brother Yusuke come to visit their grandfather in the countryside. Although they are far apart in age, they are close siblings. One day, Yusuke witnesses Harura having an affair with an old friend she has just met. In order to clear up the misunderstandings of her ignorant brother, Harura decides to use her body to give him a sex education...