"A wedding lasts for a day but a marriage lasts for a lifetime." Lee Jisoo, a wedding planner, refused to be scouted by the CEO of I-Hill, citing her usual beliefs. It would have been cool but she got drunk due to a 500 million won debt that she took on and spent the night with the man. "Did I kiss you first? I think I made a big mistake yesterday." "Lee Jisoo, were you such an irresponsible person?" Woo Seok Yoon, takes over her debt and wants them to take responsibility after sleeping with each other. But... was all of this just part of his scheme?!