Yuri lives in Tokyo with her hardworking husband. One day, her nephew Koshiro came up from the countryside to prepare for his exams. He asked if he could stay at his uncle's apartment for about a week until the exam. Yuri enthusiastically welcomed this rare guest. However, contrary to her aunt's intentions, the gaze of Koshiro, a lustful exam candidate, was fixed on his young, beautiful, and busty aunt's body with growing frustration. Then one evening, when her husband was out for a night shift…!
