He happens to be in a mixed-gender hot spring, and is so excited by the sight of a beautiful woman naked that he can't help but get an erection! He's hesitant, but when he brazenly shows her off, she stares at his erect penis! Unable to contain herself, the girls gradually develop lewd expressions, and despite their hesitation, they reach out and fuck him hard! This is the fifth installment of the popular series, with one more person added from the previous one!