Who killed the teacher's milk ball yoyo?

Yoyo of the teacher's milk corps committed suicide. Yoyo is the role of the teacher's milk regiment. Being snubbed by Cheng Jun, I had a one-night stand with Xiaoman's brother by chance. After a one-night stand, he wanted to get rid of each other, but Xiaoman's brother was stubborn and yoyo was smashed by Cheng Jun in a tryst. In a fight between them, yoyo killed Xiaoman's brother by mistake. Cheng Jun tried to stop her from being investigated by the police. Teacher's Milk Corps is a fashion TV series of TVB Emerald Channel in Hong Kong, starring Deng Cuiwen, Xie Tianhua, John Chiang, Cecilia Yip and Shang Tiane, with Chi-wah Lam as producer and Liu Caiyun as screenwriter. The play tells the story of a teacher's idle and boring life.