What Can You Do to Us, Second Years? Don't Get Cocky Just Cause You're Older - S1.E7

To take revenge for the defeat of Oniyokozuna, some Second Year students start beating up on First Years. Momotaro stops the First Years from taking immediate revenge as it is against school rules to lift a hand against a more senior student. The First Years are then invited to a Meeting Ceremony with the Second Years. The ceremony consists of a series of humiliating and deadly acts to be carried out by the First Years. Momotaro finally acts and challenges the Second Year acting head Edogawa, beating him with one kick, ending the meeting. When the instructors prepare to expel him, Principal Edajima reminds them that Momotaro did not raise his hand, thus not breaking the rule and will not be expelled.