Pan Yiyun, a female high school teacher with a childlike appearance, works in a girls' school. She is often laughed at by her classmates and feels disgusted with Bai Luyuan, who leads the rebellion. It wasn't until they saw another side of her during a torrential rain that the two of them had a good feeling in their hearts. As time went by, the two gradually felt the out-of-control feelings. By chance, they were in the same room together, and under the catalysis of the confined space, they confirmed and persisted in their feelings.