Su Zaizai grew up in a good family environment and became a person who doesn’t easily get obsessed with boys and doesn't blindly follow others. On the first day of high school, Su Zaizai disdainfully dismissed her good friend's obsession with boys but had an instant face-slapping moment when she encountered Zhang Lurang. Su Zaizai fell in love with him and decided to take immediate action, transforming herself into a clingy follower behind her crush. Zhang Lurang is a person who appears to be quite confident on the outside yet constantly doubting himself on the inside. Because of his genius younger brother, Zhang Luli, Zhang Lurang is constantly compared to him by his mother. Zhang Lurang's life has always been like living inside a thick shell. He’s introverted, speaks little and keeps everyone at a distance. However, after meeting Su Zaizai, light pierces through Zhang Lurang’s shell.