Seven-day Swapping.

Cheon-seok and Mi-seon remarried. Mi-seon goes on a trip with her friends and asks her daughter-in-law to take care of her father-in-law for a week. Her father-in-law and her daughter-in-law came to live together for 7 days. Her daughter-in-law, who tasted her father-in-law's crispy pork belly, falls in love with her father-in-law...