It's easy to sell the idea of love, but hard to allow yourself to fall in love. Min Woo works as a professional boyfriend, going on dates with his clients and giving them a special experience—just for one day. Ji Ahn is a professional letter writer who helps her clients craft the perfect love letters to their loved ones. Although Min Woo and Ji Ahn sell the idea of love to their respective clients, they’re afraid to embark on this experience themselves. When Min Woo and Ji Ahn meet, will they be able to muster the courage to take the plunge into love?