Despite strong opposition from her parents, Meguri decided to marry an older man who already had a son. Her stepson, Takeshi, was a shy boy. In the beginning, she found it difficult to talk to Takeshi, but after Meguri's efforts, they grew closer and started to communicate more. Although Meguri also wanted to have a child with her husband, she was unable to fulfill that desire because her husband was busy with work. She was unaware that her stepson was not as well-behaved as she thought. He had long lusted after her beautiful body. One day, when her husband couldn't come home due to work, she casually changed clothes in front of Takeshi, who could not resist anymore and took advantage of her. He proceeded to have sex with her, and despite her refusals, he continued to do so. And each time, he finished inside Meguri! Although she knew this was wrong, the pleasure of having sex with Takeshi made it unforgettable for Meguri. They continued this relationship until a year later, when Meguri became pregnant...