Maki Amamiya and Hiroshi's newlywed life takes a dramatic turn when Masakichi, Hiroshi's father-in-law who lost his wife, proposes moving in. While Hiroshi, absorbed in his own pleasures and indifferent to family matters, strongly opposes the idea, Maki—having lost her own father at a young age—feels conflicted. Out of consideration for her emotions, they eventually agree to start living together. One night, after a heated argument with her husband, Maki decides to return to her parents' home. Masakichi comforts her with gentle words, but as Maki begins to lean on his kindness, his demeanor suddenly shifts, revealing hidden desires.