Having married Yuki, her first love, Hina is a pure woman who has never known any man other than her husband. Exposed to gossip about affairs and love-stealing relationships on TV and weekly magazines, she begins to find her ordinary daily life dull and unexciting. One day, Kurokawa, the head of the neighborhood association, visits her. Having lost his job due to an inappropriate relationship with a former student and separated from his wife, Kurokawa becomes captivated by Hina and returns to her door, ringing the doorbell once again. His sudden appearance becomes a life-shaking event that profoundly disrupts Hina's mundane existence.