Shinohara Kanon is 33 years old. She works hard in her job as a home designer, but she has come to a crossroads in her life. She realizes that she is now entering her mid-thirties and spends her downtime drinking and generally being slovenly at home. One day, at an event organized by a friend, she bumps into a younger, handsome, well-dressed man. She learns that his name is Shirosaki Makoto, that he is 28, and that he is the CEO of a company president. Later, he springs a surprise on her, asking her to marry him – on certain conditions. Unsure if this is a one-in-a-lifetime opportunity to turn her life around or a situation she should leave well alone, she hesitates. But Shirosaki Makoto is insistent – and as her 34th birthday approaches, could marriage really be in the cards for her?