Here's the gist of the story:
* Bo-eun's Family Secret: Bo-eun's family is in dire financial straits. To save their family business, Bo-eun's grandfather, a former baseball star, makes a deal with his friend. The deal? Bo-eun will marry his friend's son, Sang-min, as a way to repay the debt.
* The Contract: The marriage is a contract, not a love match. Bo-eun and Sang-min are both shocked and reluctant about the arrangement. They are forced to live together as husband and wife, despite the fact that they hardly know each other.
* Forced Cohabitation: Initially, they clash and bicker constantly. Bo-eun is a bubbly and energetic high school student, while Sang-min is a serious and introverted law student. Living together creates hilarious situations and awkward moments as they adjust to their new roles.
* Developing Feelings: Despite their initial resistance, Bo-eun and Sang-min begin to develop feelings for each other as they spend more time together. They discover shared interests and learn to appreciate each other's personalities.
* Obstacles and Challenges: Their relationship faces obstacles from their families and from their own insecurities about the unconventional nature of their marriage. They also have to deal with misunderstandings and jealous rivals.
* The Ultimate Choice: Bo-eun and Sang-min eventually realize that they have fallen in love. They must make a difficult decision: whether to stay married for their families' sake or to pursue their newfound feelings.
The film is a heartwarming and funny tale about love, family, and finding your place in the world. It's a charming blend of romance, comedy, and drama, offering a unique perspective on the complexities of marriage and relationships.