While her husband is away on a work assignment, Yuki lives peacefully with her only daughter, Kana. One morning, Kana suddenly asks, "Mom, is it okay if I bring my boyfriend home today?" Surprised but curious, Yuki wonders what kind of boyfriend her daughter has, and eagerly tidies the house more thoroughly than usual. In the afternoon, Kana returns with her boyfriend, Norihiko. As the young couple spends time together in private, Yuki remains unaware of the shocking event about to unfold just minutes later—the moment that will awaken her from a mother back into a woman. A deeply stirring encounter awaits.