Togashi, Tazawa, Matsuo and Hidemaro decide to test Principal Edajima's skills, but mistakenly attack Oni-Hige instead. For punishment Togashi must do the Boulder Bunny Hop. Oni-Hige takes Tazawa, Matsuo and Hidemaro to Rakkyo University where he accuses the students of pursuing pleasure and fashion. He then suggests that they buy and wear traditional loincloths with Otokojuku logos. When they laugh at him, he orders his students to beat them into submission...