The fifth installment of the popular series! A thorough investigation into whether women around the world are really satisfied with just one dick from the man they're dating! The film crew sneaks into a local mixed-bathing hot spring and approaches a couple in the bath. What will happen if you deliberately show off the rock-hard dick of a professional actor to a busty girlfriend with an amazing body! Even though her boyfriend is right next to her, she starts to show signs of being interested in the big dick, and eventually she is completely captivated and transforms into a woman who wants it. Watch the lewd and wild behavior of this erotic busty girlfriend!