The students of Class 3-E prepare for the arrival of their second transfer student, who is allegedly more powerful than Ritsu. The man in the white cloak named Shiro enters the classroom and introduces the boy named Itona Horibe, who surprises the other students with his relation to Koro-sensei. When Itona faces against Koro-sensei later that day, Koro-sensei is overwhelmed by the fact that Itona possesses tentacles in his hair. While Shiro uses his knowledge of Koro-sensei's weaknesses to give Itona the advantage, Koro-sensei counterattacks with rubber knives to push Itona out of the ring, thereby winning the match. Itona goes berserk after seeing himself as weak, so Shiro knocks him unconscious and carries him out of the classroom. The students interrogate Koro-sensei about his true origins, but he remains tight-lipped, stating that they must continue their mission in order to find the answers that they seek. The students ask Karasuma to teach them more techniques, as they are determined to kill Koro-sensei before anyone else.