Manami, a daughter-in-law, is extremely worried about her father-in-law Kazuya, who is exhausted after her mother-in-law dies in a traffic accident. Kazuya slowly regains his strength as he sees the image of his devoted daughter-in-law in her. One day, as her father-in-law reminisces with Manami, he is so lonely that he hugs her. However, after they share a kiss, Kazuya does not want anything more. One night, while her husband is away on a business trip, Manami entrusts herself to her father-in-law, saying, "If only I could take the place of my mother-in-law, even just once,"...