Zhang Lexiao, who has an ostrich personality, has a crush on the handsome boy Chen Youze. She finally creates opportunities to transfer her love to him, but she cannot bear the complicated world of Chen Youze. Zhang Lexiao, who is inexperienced in the world, has experienced the ups and downs of friends, the pressure of her love rivals, and the obstruction of her family. She always remembers what Chen Youze said to him that year: "Believe me!" How many people will stand firm and wait for love? The world is impermanent and worldly things are troublesome. Will you be the one who still believes in love?