Hikaru was raised as a sheltered daughter in a strict household, leaving her with very little sexual experience. She had almost no interest in sex during her youth and didn't even know how to masturbate. Her serious, responsible husband works at a major bank and, like her, has little experience—his technique is clumsy and unsatisfying. On top of that, his cock is small, leaving her with lingering doubts about what sex should feel like. She once confided in a friend, desperate for a real sexual experience. In their encounter, he lifts her skirt and begins caressing her ass. When she's given a vibrator she's never used before, she's overwhelmed and visibly flustered by the complex stimulation she's never felt. Blushing with shyness, she desperately suppresses her moans but eventually reaches her first vibrator-induced climax. Her pussy gushes fluid, and when he pulls his cock out of his boxer shorts, she says, "It's so big and hard to lick," yet frantically takes it into her mouth. Gradually getting used to the size, she starts sucking vigorously, making wet, slurping sounds, her lewd expression growing more aroused. When his fully erect cock is pushed into her pussy, her tight entrance stretches with a deep "gugugu" sound as it opens. Overwhelmed by the unfamiliar size and intense stimulation, she eventually starts moving her hips on her own, fully savoring the sensation. Throughout, she struggles to hold back her voice out of inexperience and embarrassment, but in the end, her muffled pleasure erupts into loud, unrestrained screams.