Mayu is 30 years old and eight years into her marriage. Her husband is around the same age, an ordinary salaryman. Their sex life occurs once or twice a month, with almost no foreplay. Though she's somewhat dissatisfied that her husband reaches orgasm quickly after penetration, she's come to accept this as normal. The sensation of being carefully observed excites Mayu, and the tension of having her body shaken draws her in. During the sensitivity test, her breasts are groped and her nipples teased. Her body trembles with tension as she lets out soft moans. Her clitoris is stimulated thoroughly, and despite her shyness, it makes wet, squelching sounds. She rarely performs blowjobs, but when she does, it feels incredibly good. Using a powerful bullet vibrator she's never tried before, they move to a hotel. Each time fingers or the vibrator enter her soaked pussy, Mayu gradually reveals a more lewd side. Thrust into from behind, in side position, and other angles, she suddenly reaches orgasm. Finally, in missionary position, she's driven to a second intense climax. Seeing Mayu completely exhausted after this new experience, her husband feels she's adorable—sparking anticipation for their next encounter.