Happy housewife Haruka Kitagawa senses something wrong when her rising husband Shoki suddenly changes his attitude. One night, his boss Mikuni brings him home blind drunk, and her peaceful life begins to collapse. Lonely but powerful, Mikuni approaches Haruka with promises of protection, dragging her into a deep inner conflict despite her resistance. As her marriage turns upside down, she is forced to choose her own path between guilt and desire. Then comes the seventh day…