Xi 'er and Ou Mumu were best friends in the novel, and they had a deep relationship. On a sunny morning, when Ou Mumu woke up, she found that her mobile phone was missing. She quickly got up to look for it, but she found that Xi 'er's mobile phone was missing. Ou Mumu felt that it was very strange why Xi 'er would steal the phone, so she decided to investigate. During the investigation, Ou Mumu found out that Xi 'er was with another man. She was very angry. However, after slowly communicating with Ou Mumu, she finally found out that Xi 'er was misunderstood, and the contradiction between the two of them was resolved. In the end, Ou Mumu and Xi 'er became good friends, and the deep feelings between the two were also guaranteed.