Three years into her marriage, housewife Nao finds herself emotionally unfulfilled despite material comfort, as her husband suffers from erectile dysfunction. One day while cleaning, she notices a young man who recently moved into the apartment across from hers secretly watching her through the window. In that moment, she realizes her attraction to him and gradually becomes drawn deeper into his orbit. Captivated by his youthful charm, her connection with him intensifies, and through their growing relationship, Nao begins to discover new hope and desire beyond her stagnant married life.