<Tr> <Td_colspan="3"> Koro - sensei takes the students of Class 3 - E to their own private pool that he made, but the students are alerted when Koro - sensei's tentacles swell up when soaked in water . Meanwhile, Terasaka becomes irritated when his friends Takuya Muramatsu and Taisei Yoshida are getting along with Koro - sensei . Terasaka agrees to collaborate with Shiro and Itona in their assassination plan, previously dropping a "bug bomb" in the classroom to excrete Koro - sensei's mucus and secretly adding a transmitter in the pool . Then, Terasaka gathers the other students in the pool, using a gun connected to the transmitter as a signal for Shiro and Itona . Instead, the transmitter sets off an explosion and puts the students in danger, forcing Koro - sensei to get his tentacles soaked in order to rescue the students from being swept away . Koro - sensei is left at the mercy of Itona, while Sumire Hara is hanging onto a tree branch nearby . Following Karma's plan, Terasaka uses his shirt still affected by the "bug bomb" to infect Itona, allowing Koro - sensei to rescue Hara whilst the other students splash water to halt Itona . Shiro and Itona are forced to withdraw yet again . </Td> </Tr> <Tr> <Th> 15 </Th> <Td> "End - of - Term Time" "Kimatsu no Jikan" (期末 の 時間) </Td> <Td> May 1, 2015 </Td> </Tr> <Tr> <Td_colspan="3"> With the final exams approaching, Koro - sensei offers an incentive, in which each student who gets the best overall score in their top subject will get to shoot off one of his tentacles during their next assassination attempt . Meanwhile, Shindō informs the students of Class 3 - E about Class 3 - A's Big Five (Gakushū Asano, Teppei Araki, Ren Sakakibara, Natsuhiko Koyama and Tomoya Seo), who are all determined to take Class 3 - E down . When Nagisa, Manami, Yukiko, Isogai and Rio Nakamura go to study in the main campus library, the Big Five proposes a contest, stating whichever class snags the most top spots in the exams can demand anything from the losing class . While Class 3 - A sets their sights on making Class 3 - E show complete servitude to them, Koro - sensei proposes his own suggestion of what Class 3 - E can ask from their opponents . With both classes determined to win, the stage for the end - of - term final exams is set . </Td> </Tr> <Tr> <Th> 16 </Th> <Td> "School's Out / 1st Term" "Shūgyō no Jikan: Ichi - gakki" (終業 の 時間 ・ 1 学期) </Td> <Td> May 8, 2015 </Td> </Tr>

How many episodes are there in assassination classroom season 2