On the eve of her high school reunion, married woman Saori (Reiko Sawamura) receives an unexpected gift: a luxurious tight-fitting dress. Preferring modest clothing in daily life, she feels surprised and unsettled by the mysterious present, yet decides to try it on in front of the mirror. The reflection reveals a completely new side of herself—one she's never seen before. The sender is none other than her former classmate, Sugaura, who has secretly harbored feelings for her since school days. The moment he sees her in that dress, his long-suppressed desire erupts uncontrollably. Overwhelmed by passion, he pins her down and takes her by force.