Yuki's husband, Yuichi, took over the family company, and so she moved into her husband's family home. Her mother-in-law, Ikumi, doted on Yuichi, and was very critical of Yuki. However, Yuki's devoted support for Yuichi made her father-in-law, Taro, lustfully aroused. Then, one day, when Yuichi and Ikumi were not around and Taro was left alone with Yuki, he pushed her down and raped her. After that, Yuki was afraid of Taro and avoided him, but Taro continued to play with her body everywhere, even when Ikumi was there...