A promise originating from the family made two men and women who were originally incompatible with each other become husband and wife. However, the reality is before our eyes. Not all marriages are necessarily successful, and not all endings are happy. A year later, both parties returned to their own lives, thinking that they would never meet again. But when she saw the excellent him standing on the stage of his life shining brightly, she couldn't help but wonder, if there was no gap between birth and class, would this love have a beautiful and sweet ending...
But the reality is always cruel, and nothing is always as one wishes. Will she and the people she admires be able to achieve the ending she wants, or is life really just like this, and he and she can only trade their lives after all...
Concept: Love needs to be measured by money, not sincerity.