There was a girl who came to Shanghai alone because she was admitted to the university. She started her university life, met her friends, and lived happily. But one day, she met someone she didn't expect to meet. What's more, the two of them were in the same dormitory. It happened that some unpleasant things happened with others a while ago, and the heroine entered the university disguised as a man. So she just went with the flow and met the boy as her cousin. However, on the first day of school, the two had a conflict over a trivial matter. As a result, the boy asked for a duel to resolve the conflict. The girl later apologized to the boy. After apologizing, she realized that the boy had already regarded her as a good friend, so she had forgiven him. In this way, the colorful college life began.