Man is an animal that makes bargains: no other animal does this - no dog exchanges bones with another.

Summary

Class D gets the results of their last exam and everybody passes except for Sudo, who missed the passing threshold by one point. The grades were the result of Ayanokoji spending 15,000 points to buy the questions to an old exam from an upperclassman three days prior to the exam, which is within school rules. Ayanokoji approaches Chabashira asking the question of whether equality exists, and she answers that it does not, which Ayanokoji agrees with. Ayanokoji and Suzune then spend their points to buy the missing point from the teacher so that Sudo's expulsion can be rescinded. That night, Kushida organizes a little party in Ayanokoji's. After the party, Kushida leaves but forgets her cellphone and Ayanokoji follows her to find out the truth about her personality. Having discovered her secret personality, Kushida demands Ayanokoji to keep it a secret or else she will accuse him of raping her by having him forcefully touch her breast and using the fingerprints as evidence.