Upon learning of his father's remarriage to the beautiful stepmother Aoi, son Daisuke inwardly rejoices at the thought of living with her, though he gradually develops romantic feelings. Unable to express his emotions, he begins secretly filming her, only to be caught one day. Convinced everything is over, Daisuke seizes it as his final chance and confesses. To his surprise, Aoi responds positively—sparking an illicit, forbidden romance filled with hidden desires and stolen moments.