A slut crazy about sex. A sexual deviant worse than a male prostitute. Min Hwan-sung, a man with rumors that don't match his chaebol status at all. Due to an arrangement between their elders, Seorin goes on a blind date with him. “Since we're going to pass on our genes anyway, wouldn't it be great to have the best partner?” Treating her like a surrogate, she tried to call off the engagement, but Seorin had already been sold for 30 billion won in investment money to save her family. To a devastated Seorin, Hwan-sung proposes a provocative bet using the cancellation of their engagement as collateral...