On her 13th birthday, Chen Qianran was in a dilemma: she accidentally met the newly transferred handsome boy Cheng Yixiao, and her childhood sweetheart Meng Xingran gave her a half-heart-shaped key chain... She could not refuse Xingran's heart, but she was deeply attracted by Yixiao. So, with the help of his calm best friend Luo Yinan, he tried to avoid Xingran's eyes and ears through a strong interpersonal network, and also tried to get in touch with Cheng Yixiao... What was the ending? Please pay attention...