During the school exam, Haoyu actually took out his thong and started masturbating. However, Haoyu's behavior was discovered by the teacher and he was detained in school for probation. Haoyu, who was taught by the teacher to spank his palms, not only did not reflect on it but also happily enjoyed the feeling of being spanked. After school, the teacher was thinking about Hao Yu, a terrible student, on the MRT. Unexpectedly, after falling asleep, he met a crazy guy on the train. The real face of this crazy guy was... Chen Hao Yu!