Despite Itona's increased deadliness, Koro-sensei manages to evade his attacks and defeat him. Just then, Itona starts reeling from the effects of his tentacle implants, which he had been keeping under control due to Shiro's treatments. With Shiro deeming him of no further use and abandoning him, Itona goes on a rampage and starts destroying cell phone shops. As Koro-sensei tries to reason with Itona, Shiro launches another attack on him and captures Itona, using him to lure Koro-sensei into another trap. However, the students arrive on the scene to rescue Koro-sensei and Itona, forcing Shiro to retreat. Afterwards, as the students learn that Itona was allegedly abandoned by his parents after their electronics company went bankrupt, Terasaka and his crew help Itona calm down, allowing Koro-sensei to safely remove the tentacle implants and enroll him as an official student of E Class.