Tsubasa Haneda, happily enjoying her newlywed life, begins to worry as her husband gets increasingly busy with work and their conversations grow scarce. Feeling him drift away, she confides in her father-in-law, but that night, he suddenly makes an unusual request: "Will you wash my back?" Flustered, she heads to the bathroom, only to be abruptly attacked. As doubts about her marriage deepen, her relationship with her father-in-law takes an unexpected turn. Desire and anxiety emerging from the cracks of daily life pull the story into darker depths.