The reward given by my sister's friend

A certain guy really likes his sister's friend Maron Natsuki. One day she discovered that when she came to his house to visit, Maron gave her a thirty-day challenge of no sex or masturbation. If he passes the test, a great gift will appear before him, which is Maron's beautiful body, with which he can do whatever he wants. After months of trying, the day of making love with sister Maron Natsuki has arrived. She's really sexy, especially her eyes. I really like this jav idol's style. How about you?