Ye Xiaowen and Levin are brothers. Levin is cheerful, unruly, very naughty and often gets into trouble. His father and teachers hate him for not turning iron into steel. Ye Xiaowen and Levin have opposite personalities. He is taciturn, smart and sensible, and can cook. He met Levin because of a misunderstanding and finally became inseparable brothers. At first, Levin mistakenly thought that Ye Xiaowen's life was related to his father, so he was very exclusive to him. But after he knew the truth, he decided to get along with Ye Xiaowen. Even though they are not related by blood, they have become friends like relatives.

Ye Xiaowen introduced Levin.

After learning about Ye Xiaowen's life story, Levin gradually changed his attitude towards Ye Xiaowen, and enlisted a group of partners to formally welcome Ye Xiaowen to join. Besides Levin and Ye Xiaowen, there are lively and humble transfer students Jin Beibei with a good appetite, Mai Ba Zhao Jiabao with a musical dream, and Meng Tian, the monitor who dreams of becoming a writer.

Levin is a boy who can be a demon. He belongs to the type of not going home for three days to uncover tiles, and his thoughts are particularly restrained. Levin and Gao Bin are a pair of father and son who get along like brothers. Although they don't seem to deal with each other very much, they often care about each other silently, which is very annoying and very concerned about each other. After Ye Xiaowen joined in, there was a hilarious quarrel because of the mystery of his life.