The heroine, who grew up in a poor family, went to work in a big city when she grew up. She saw that her colleagues and friends were all using credit cards, and her life was very uncomfortable. So the heroine applied for her first credit card and fell into the abyss of debt from which she could not extricate herself. This story shows how the heroine was shaken and took out a credit card. As a result, she applied for more credit cards and her debts became higher and higher. When the heroine was at her most desperate, she met her younger brother. Although he was a few years younger than the heroine, he was very mature and wise. With his help and care, the heroine controlled all her expenses, increased revenue and reduced expenditure, and gradually got rid of debts, and married her younger brother. The two of them raised six cats and one dog in the past few years and lived a simple, debt-free and happy life.