I came to Tokyo to take my entrance exams and met my cousin Kaho for the first time in a year, and we decided to stay together in the same room for a week. The once innocent girl has become a slutty dark-skinned gal who has been absorbed into the city...She brings a guy over every day, so I can't concentrate on my studies...She starts having creampie sex right next to me every night while I sleep, and it makes me feel frustrated. However, on the last day, I get a rare chance to lose my virginity to her!!