Mizuho (30) works for a famous cosmetics company. Her job was going well, working with her boss, Uzaki (35) whom she admires and respects. But one day, Uzaki suddenly gets transferred to the New York branch, and gets engaged to her coworker, Riko. Mizuho, shocked and confused about Uzaki's engagement, tries to forget Uzaki and marries her coworker from the sales department Shinichi. Although Shinichi loves Mizuho, he cannot let go of his doubts for her. Riko tries to take advantage of his insecurities. Meanwhile, Uzaki comes back to Japan headquarters...! "Everyone's having an affair except for me...?!" A story of love and jealousy begins!