After moving out on his own for a new job, Tsuyoshi catches sight of his married neighbor Rinka on her moonlit balcony wearing a dress shirt. They gradually grow closer and begin sharing dinner whenever her husband comes home late. One day, Tsuyoshi hears her husband shouting next door. When he opens his door in concern, Rinka is standing there alone after fleeing their argument. He agrees to hide her for a while and lends the wife, who left with nothing but the clothes on her back, one of his dress shirts—beginning their secret two-night, three-day affair.