On the day of the wedding, the bride failed to arrive on time, and the groom, after waiting in vain with no result, resolutely decided to change partners and get married. A delivery rider who happened to appear became his temporary bride. The two agreed to a contract marriage, taking what they each needed. Thinking it was merely a transaction, they gradually developed feelings for each other while getting along. Facing the entanglement of their ex, doubts from family members, and twists and turns in their careers, they supported each other, turning from fake spouses into true partners. In the end, at a crucial moment, both chose to run toward each other, reaping the happiness that belongs to them.