Lu Yan, who died saving people, was reborn and returned to his high school days where he had low self-esteem and was bound to the charm system. According to the systematic tasks and his own perseverance, he completely transformed from appearance to inner: losing weight, gaining height, improving grades, and practicing calligraphy hard. During the transformation, he faced the bully Zhang Mingquan, and formed a "green-mok friendship" with the cold-blooded schoolmaster Su Lingxiu because of his calligraphy. He also gained the sincere friendship from Xia Chuchu, Jiang Luoxi and others, made up for his past regrets, and wrote about his passionate youth with sweat and enthusiasm.
