The heroine Su Nuonuo, who comes from a poor family but is optimistic and kind-hearted, has no choice but to sign a one-year contractual marriage agreement with Lu Xingci, the president of Shadiao, in order to raise her mother's high medical expenses to help him cope with the family's pressure to marry and business alliances. Su Nuonuo thought she was about to face a ruthless boss, but she didn't expect that Lu Xingci was privately a young man who loved telling cold jokes, emoticons, and was keen on surfing the Internet. The two people under the same roof made countless jokes due to their huge differences in personality and living habits. In the process of playing the role of a loving couple, Lu Xingci was gradually attracted by Su Nuonuo's innocence and kindness, and Su Nuonuo also felt unprecedented warmth and security under Lu Xingci's seemingly unruly protection. However, Lu Xingci's hypocritical cousin Lu Jingming has always coveted the position of president. On the surface, he cares deeply about Su Nuonuo, but in fact, he works hard at every step, trying to use her innocence to frame Lu Xingci. Under Lu Xingci's guidance and protection, the cute Su Nuonuo began to grow up slowly, and learned to distinguish people's hearts. Finally, she saw through Lu Jingming's conspiracy at a critical moment and helped Lu Xingci save his career. When the contract expired, both of them loved each other deeply. Lu Xingci turned the contract into an eternal commitment with a grand and ridiculous proposal.