Although she is on good terms with her husband, Umi spends her depressing days without being blessed with children. One day, her brother-in-law, Kyoichi, visits her house for a memorial service. Kyoichi, who has a strong sexual desire and loves women, relentlessly pokes at her lust hidden deep inside. "I was just swept away..." Umi tells herself, and she has a one-time relationship. However, the relentless caress that is different from her husband, the stimulation of her cock that pierces her head, quickly overwrites her pleasure. And Umi suddenly fell into a secret affair with her brother-in-law...
