Nami is a full-time housewife who married her husband, a business owner. Because he is good at cooking, he opened a cooking class at home. One day, her ex-boyfriend, who broke up five years ago, shows up at a cooking class and meets her fatefully again...While her kind husband is a kind husband, she spends a cold, unsatisfied marriage, her ex-boyfriend, who has regrets about Nami, suddenly approaches her. The gears of fate begin to move... An affair with her super-exual ex-boyfriend, with sweat, saliva and love juices, and having sex over and over again! "I did it..."