|“||I will never marry you a second time!||”|
—Daegwang and Sunyoung to each other
Do It One More Time follows the story of married couple Sung Daegwang and Yoo Sunyoung. 8 years into their marriage and constantly fed up with each other, the two regret having married one another. One night, after getting drunk, the two openly admit to themselves that they wished they never married before falling asleep. When they reawaken, they find themselves having gone back in time 10 years to the night they first met. It is then they decide to not remarry in order to live happier lives, only to realize those actions could lead to many things changing, including their beloved son Joonsu ceasing to exist. With many reasons to continue hating each other, yet just as many reasons to love each other again, Daegwang and Sunyoung have to both decide if they will finally remarry or go their separate ways.