A group of four close friends went to a hot spring together after a long time without seeing each other. In fact, this trip had another purpose. Ken-chan secretly loved Asami-chan but didn't have a chance to express his feelings to her. He asked his close friends, who were already married, for help. So they organized this trip to bring the two closer together. Nao and her husband helped Ken-chan achieve his goal. However, that night, seeing Ken-chan being forceful with Asami-chan sexually, aroused Nao. She couldn't stop thinking about Ken-chan, and when he entered the women's bathroom, Nao held him back and used her beauty to seduce him into ejaculating inside her. And when they returned, Nao became pregnant, and that pregnancy could very well be Ken-chan's...