Dazhen (Kim Ha-neul) is envied by many people for holding hands with her school lover until now and being a best-selling romance novelist. However, few people know that Dazhen, who is about to turn 30, is also facing many troubles. Her boyfriend Jae-young (Yoon Ji-sang) is a gold medal director of the shopping channel. He is also handsome and has countless suitors around him, but he only loves Dazhen. Dazhen, who was very confident in their relationship, gradually felt a crisis after six years of getting along. No longer as romantic and passionate as in his school days, Jae-young increasingly treats himself as air after work. The once romantic man now does not know what romance is. Is there always a period of burnout in love? The so-called seven-year itch came a year early. Dazhen didn't know whether she should continue this state with Jae-young. So, Dazhen decided to "live together" to make the two of them go a step further, but found that she was self-defeating...