BL type. Yu Chengyan met a man named Zhang Shiheng in the summer when he was a freshman in high school. When they were divided into classes in the second year of high school, Zhang Shiheng and Yu Chengyan happened to be assigned to the same class. Later, Yu Chengyan found out that the two had known each other since they were children, but they lost their memories because of the earthquake that year...
Purpose: redemption
