At the request of her father, who has been transferred overseas, Miyuki is tasked with looking after Kyosuke, who is studying for his entrance exams, as a housekeeper. This year marks the fourth time that Kyosuke has failed the exam, and he is anxious. He studies hard for 15 hours a day. Kyosuke pushes himself too hard, and his eyesight deteriorates significantly. After a few days, his condition doesn't improve, and when he goes to the hospital, he is told that it is simply fatigue, and he is at a loss. One day, while Kyosuke is doing housework in a tight skirt, Miyuki's panties peek out from under her plump thighs, and Kyosuke's eye catches his eye...