EKDV-663 - Boyfriend's away, so I hooked up with his brother in our bed

Miyazaki Rin, unsatisfied with a boyfriend who is content with just oral, shows off her erotic side in a setup where she sleeps with his brother. Well, Rin is good at oral, so it's understandable for a guy who loves it. But Rin, who loves cock and sex, can't be satisfied with just that. She's a mixed-race girl, and while she doesn't have an overwhelming amount of natural sex appeal, she seduces her boyfriend's brother. Of course, she performs oral, but she also goes all out with sex, including cowgirl positions. Ultimately, Rin craves internal stimulation and wants to cum repeatedly. Is this the finale to her previous work at Crystal Eizo, 'Made to cum over and over by the brother's bigger one...'? Is this really a valid sales strategy?