Kawai Yoshiko (Sakurako Ohara) once had grand plans for her romantic future. She wanted to marry at age 26, have her first child at age 27, and give birth to her second child at age 29. But now, just a few days ahead of her 29th birthday, all her plans appear to have come to naught. Her boyfriend dumps her, leaving her single and alone. In her despair, she goes to a cafe to wallow in her solace and unhappiness. But there, she runs into Yuki Masaomi (Matsuda Genta), a junior colleague from work. At the office, Yuki Masaomi is nicknamed "AI," due to the fact that he looks incredibly handsome, but is emotionally cold, and does not seem to have any empathy. But when Kawai Yoshiko tells her colleague about why she is so unhappy, he comes up with a remarkable offer. If she cannot find a romantic partner before her 30th birthday, he will marry her instead. Could this be his way of telling her that he likes her? Could they be compatible? Or will this offer lead her to further heartbreak?