Chika was eagerly awaiting the day she would finally bring her daughter's boyfriend home. She had heard that Atsushi, her only daughter Haruko's boyfriend, was honest, kind, and fond of a warm, homely atmosphere, so she looked forward to his visit. Atsushi apologized gently, saying, "I'm sorry, but I'm not used to a family environment since I don't have a mother," yet at that moment, Chika hadn't realized the truth—Atsushi's feelings toward her were gradually shifting into something far deeper than mere affection for her daughter. As the reality unfolds, how will Chika respond?