Japanese wife's sister gets fucked by mistake, but still enjoys it

The video features a Japanese college student who is staying in a dorm with her sister. The sister is away for the day and the college student decides to have some alone time. She is masturbating when she hears a knock on the door. Thinking it's her sister, she invites the person in. However, it turns out to be a man who has mistaken the college student's room for her sister's. The man is embarrassed but the college student is not. In fact, she is turned on by the situation and decides to let the man have sex with her. The man hesitates at first but eventually gives in to the temptation. The two engage in passionate sex, with the college student enjoying every moment of it. The video ends with the man leaving satisfied, having just had sex with her sister' sister.