While her father was stationed overseas, Kazumi learned that her son Kyosuke was intensely practicing for his professional golf exam. Kyosuke barely ate, spending every day from morning to night on the course. During this time, her father asked Kazumi, whom he had met abroad, to work as a housekeeper and look after Kyosuke. With only a few days left until the pro exam, Kyosuke struggled with his putting technique. One day, when Kazumi came to help him practice, he caught a brief glimpse of her panties peeking out from under her voluptuous thighs—and strangely, his putts started going in smoothly. From that day on, Kyosuke's putting suddenly became accurate and consistent. Wondering what exactly had caused this sudden change, he couldn't help but feel something had shifted inside him.