This is the story of pure yet forbidden love and also the complicated relationships of those who around them.

Kurihara Mia fulfils a long-cherished passion for jewelry by getting a job in the public relations department at Tiffany & Co. One day, during a business trip, Mia loses an engagement ring from her boyfriend - Yamashita Youta. The ring is eventually found with help of a man who happened to be there. Mia is relieved, but at the same time, she is struggling to accept her fiance's marriage proposal because of the condition he gave - that she quits her job. A few days later, Mia encounters the man who helped her to find the ring, only then to find out that the man is Miyoshi Kairi - the vice president of her company. Kairi tells her "if it is your dream job, see it through". Mia starts to fall for Kairi who is strict yet kind. -- TBS