Ep. 11: Class 3-E prepares for a powerful new transfer student who claims to be Koro-sensei's brother.
Class 3-E prepares for their second transfer student, Itona Horibe, who arrives with a white-robed man named Shiro. Itona claims to be Koro-sensei's younger brother and possesses tentacles identical to those in Koro-sensei's hair. During a match, Shiro uses knowledge of Koro-sensei's weaknesses to aid Itona, but Koro-sensei counters by using Anti-Sensei knives against the shared tentacle traits. This strategy allows Koro-sensei to knock Itona out of the ring and win. When Itona reacts negatively to studying and attempts a counterattack, Shiro knocks him out and departs. The class questions Koro-sensei about his connection to Itona, but he remains silent, insisting they must use assassination to uncover the truth. Determined to kill Koro-sensei before anyone else, the students decide to have Karasuma teach them more assassination techniques.
Episodes
- Ep. 7 · Class 3-E travels to Kyoto for a school trip that doubles as an assassination mission.
- Ep. 8 · Red Eye's Failed Assassination Attempts During the Kyoto School Trip
- Ep. 9 · Transfer Student Time
- Ep. 10 · Irina competes against Lovro while the class visits Hawaii with Koro-sensei.
- Ep. 11 · Class 3-E prepares for a powerful new transfer student who claims to be Koro-sensei's brother.
- Ep. 12 · Class 3-E faces the baseball club in a high-stakes exhibition match against Sugino's former team.
- Ep. 13 · Karasuma faces a sadistic replacement PE teacher who challenges his student to a knife duel.
- Ep. 14 · Koro-sensei's pool weakness exploited by Terasaka's failed assassination attempt
- Ep. 15 · Koro-sensei offers tentacle shooting as prize for top exam scores in end-of-term finals