Since childhood, Guan Yu and Zhang Fei have ended up in expulsion from schools. 12 years later, Guan Yu and Zhang Fei meet Liu Bei upon arriving to Yu Teng High School, their 24th school, just as a group from Huang Jin High School arrives to invade them. Guan Yu manages to chase them away, however, the students of Yu Teng High School still refuses to let them in. Wanting to use Guan Yu and Zhang Fei's powers to his advantage, Liu Bei suggests that they enroll Dong Han Academy by becoming sworn brothers. Wanting to finish high school, Guan Yu and Zhang Fei agree to the idea.