My stepfather was worried... why couldn't he have a worthy successor? One day, by chance, he caught his son and daughter-in-law having sex, and he became convinced. Yes... my husband lacks the ability to be a man, so my father decided to take matters into his own hands. At first, Yuriko resisted desperately with reason, but soon her instincts took over, and she found herself becoming a female in front of her father. However, things took an unexpected turn when her husband witnessed her transformation. What did her enraged husband do? And what was the outcome?

義父は悩んでいた…なぜ大切な跡取りができないのかと…ある時、息子夫婦のセックスを偶然目撃してしまい、確信する義父。そう…息子は「漢」としての能力が低いんだと…息子の代わりに種付けを決意する義父。最初は理性で必死に抵抗をするゆりこだったが…やがて本能が目覚め、義父の前では「雌」になってしまうゆり子。しかし、その姿を夫に目撃されてしまう。激昂した夫が取った行動とは？そして結末は…？