Yuna is a diligent office worker at a construction company, constantly burdened with overtime. Two male coworkers become increasingly interested in her, drawing her into romantic and sexual relationships within the workplace. Though surprised and hesitant, Yuna finds herself unable to resist. Her uniform is stripped away, revealing her hidden big tits, as her body becomes the object of her coworkers' desires. While set in an ordinary daily environment, the story focuses on how Yuna's presence and physique are exploited by those around her.