Misa Kasuga, a 34 year old single office worker, easily breaks up with her boyfriend when she discovers that he is cheating on her while her junior co-workers are leaving the company one after another. She is now on the precipice of adulthood, and is labeled a "sellout" within her company! Then, Misa is invited out for a drink alone with the handsome boss Noguchi, but she proposes to him on the spur of the moment and gets closer to the popular boss than she ever thought possible..! But there are rumors that the 40-year-old, single boss is involved in something..!