Yukino Ooshiro is a married woman whose family home is owned by Okamoto, an old acquaintance who helped her husband, Satori, secure his job. However, Yukino holds no affection for Okamoto, who frequently overstays his welcome, drinking heavily and acting domineering. Even on her precious wedding anniversary, his misconduct escalates, prompting her to complain to her husband. Upon hearing this, Okamoto pressures Satori at work and then assaults Yukino when she comes to apologize. From that point on, he continues to dominate her, forcing her to swallow thick semen from morning until night.