Fireworks (2006)

Fireworks is a South Korean drama produced and broadcast by MBC. Headstrong and resourceful, Shin Na-ra once dreamed of becoming a career woman, but she spent the best years of her life supporting Kang Seung-woo, her boyfriend of seven years. Now he is a successful accountant and she is unemployed and rapidly approaching thirty. Na-ra hopes to marry Seung-woo, but after he returns from a business trip, he unexpectedly breaks up with her on their anniversary, telling her that not only did he have an affair, but he fell in love with the other woman, a cosmetics manager named Cha Mi-rae.