Norio, a self-proclaimed novelist living next door to Etsuko, secretly eavesdrops on the couple's intimate moments and turns them into erotic fiction. One day, Etsuko notices a familiar, nostalgic dialect in Norio's speech—one that feels warm and close to home. Realizing he is actually from the same Yamagata prefecture as her and her husband, this shared connection awakens unexpected feelings of attraction toward him. Deep-seated homesickness stirs within her, planting the seeds of an illicit romance.