Nao was content with her peaceful life with her husband. However, she never quite felt satisfied during their intimate moments together. One day, her uncle Takao—a known womanizer—suddenly visits. Confused by his provocative attitude, she gives in, telling herself it's just "one time." But Takao's delicate finger work, bold tongue movements, and powerful thrusts that relentlessly rub against her vaginal walls send her into climax after climax. After that, Takao's advances don't stop. Though Nao tries to resist, deep down she finds herself increasingly drawn to his irresistible charm.