Aimi, the president of a design firm, becomes the object of the persistent attentions of Sugiura, a client who takes a liking to her. Sugiura, the chairman of a major corporate group and wielding the power of his father, persistently pushes aggressive business proposals and lascivious demands. Aimi continues to resolutely refuse him, but the stress leads her to sigh constantly. Her daughter, Rin, encourages her with the words, "Mom, you have to always be smiling, no matter what."
