Ansatsu Kyoushitsu Season 2 Episode 23 English Subbed Episode Title:Final Boss Time.Episode Description:After struggling against both Yanagisawa and The Reaper, Koro-sensei takes further damage when Yanagisawa directs The Reaper to attack the students. Yanagisawa claims the students to be hindrances, but Koro-sensei defends his students, saying that they are his greatest gift as a teacher. Kaede attacks the Reaper, but is fatally injured in the process, seemingly sending Koro-sensei into a rage. However, his true expression turns out to be a mix of all of his emotions, and sends a large energy blast blinding The Reaper and sending Yanagisawa flying into the laser barrier killing him. Koro-sensei then fatily stabs the Reaper, who had wanted to be acknowledged by his teacher all along. Afterwards, Koro-sensei, having managed to keep Kaede's blood safe during the battle, uses his skills to heal her injury and bring her back to life.