Maki is frustrated because she hasn't had sex with her husband lately. Her body is filled with sexual desire and she starts to desire her father-in-law, who lives with her, and she starts to provoke him on a daily basis. When she helps him get changed, she purposely shows him her chest and sticks out her butt to show him her underwear. Gradually, her father-in-law also becomes aroused, and they begin to desire each other.