Yuna, who handles sales of IT equipment for businesses, is introverted and timid, enduring harsh criticism from her superiors every day while continuing to push herself. The reason she forces herself to keep working is because her fiancé, Tetsugaku, got injured and can no longer work, leaving her no choice but to return to her former workplace to save up for their wedding. Takimoto, her boss, who has long been interested in Yuna, takes advantage of her situation to exploit her to the fullest, even involving her with clients, causing her circumstances to spiral further out of control.