Young wife Yui becomes infatuated with her father-in-law's unique charm. His intensely sticky, lewd kisses—so different from her indifferent, emotionless husband—shake her to the core. Even with her husband nearby, she can no longer resist her father-in-law's seduction. She begins to care less about being looked down upon as a dirty, lustful woman, consumed instead by the desire for his obsessive, passionate kisses and rough, pleasure-inducing sex. Overcome by an addiction-like obsession, she craves to be filled and satisfied again and again.