Miho Imamura, the housewife of the Imamura family living in a luxurious detached home in a quiet residential neighborhood. Shortly after getting married, she gradually began to feel anxiety and uncertainty about married life and their intimate relationship. It wasn't exactly boredom or a rut, yet somehow her heart felt unfulfilled. She finally exploded with frustration, pouring out her complaints during a phone call with a female friend. At that moment, she heard shocking information that would shake her entire worldview.