43-year-old housewife Kaori Asagoe. Married for 15 years to a serious and sincere husband, she was initially drawn to his kindness, but recently grew increasingly frustrated sexually due to his inflexible personality. Her husband prioritizes work above all, strictly limiting sex to Saturday nights only. If he's unwell or busy on those nights, she must wait another full week, leaving her unable to voice her desires. After prolonged suffering in silence, she finally decides to have an affair. Although she refrains from masturbation to preserve her sexual desire, she has a special ritual—watching AVs about twice a year on days when she can't have sex. Now, she embarks on a new experience: feeling pleasure from another man's cock for the first time.