JUC-176 — Stepsister Tutor Koyuki Hara

Noboru is staying at his brother's house to study for his entrance exams. His brother says that he will be tutored by his step-sister Koyuki, whom he has always admired, but Koyuki's breathing and the sight of her chest make Noboru's crotch swell. One day, Noboru sees Koyuki masturbating and can no longer contain his feelings. Then Koyuki gently guides Noboru's hand to her breast... From then on, the two of them devour each other's bodies every day, but suddenly, his brother, who was supposed to have gone on a business trip, returns home...