Wife Kayoko lived happily with her college-student son Yuki and salaryman husband Takehiko. However, one day, Takehiko got demoted and his personality drastically changed. Drunk and abusive, he began physically assaulting Kayoko. In their sex life, he started treating her like a comfort woman. Despite this, Kayoko believed her husband would return to his former self and silently endured everything without complaint. Witnessing her suffering, Yuki gradually began seeing her as a woman.