The lyrics of OST Part.5, "You and I", depict a man's heartfelt vow toward his lover to remain devoted to her until the end. 'Confession Couple' tells the story of a married couple who regret their marriage, when one day they somehow find themselves transported into the past, back to their college days. 

Check out the MV for "You and I" starring the drama's leads Jang Na Ra and Son Ho Joon above. Are you enjoying 'Confession Couple'?