41-year-old Kanon is an unmarried office worker with no partner or current boyfriend. A special project is prepared for her: experiencing a "24-hour-only" newlywed life. Immediately upon meeting, she exchanges marriage registration forms and officially marries a 48-year-old single man. From that moment, their 24-hour married life begins. Amid surprise and confusion, the two start talking and gradually open up to each other. Making the most of this rare opportunity, they fulfill desires they've always wanted in a marriage. Two singles in their 40s satisfy long-held cravings during this unique 24-hour period, building a new relationship together.