Eri and Kiyoshi, married for three years. Although their relationship was good, the frequency of sex was decreasing… Eri felt unsatisfied but couldn't ask Kiyoshi, who was indifferent. She secretly masturbated to comfort herself. One day, her brother-in-law Takeshi, who often came to visit, caught her in the act. Eri desperately tried to cover it up, but Takeshi said, 'There's nothing shameful about it,' and pushed for a relationship. Despite feeling wrong, Eri gave in to curiosity and Takeshi's insistence, gradually revealing her hidden desires…
