Aoi works at a securities company and is secretly involved with Makoto Katsura, the wealthy heir of Katsura Electric. What began as a professional relationship gradually deepens as Aoi is drawn to Makoto's warmth and charm. One night, Makoto hands her confidential documents about a new product. Aoi refuses at first, knowing it's unethical, but moved by his earnestness, she eventually accepts the files. The next day, it's announced that large quantities of Katsura Electric stock—currently rising in value—have been purchased under Aoi's name. With no knowledge of the transactions, Aoi is summoned by prosecutors as a key witness in an insider trading investigation. Caught between her career and her illicit affair, she struggles amidst justice, desire, and betrayal.