It turns out that the person who asked a group of people to make the fake video is a teacher at Kaio High School. Hiiragi now asks the teacher to come forward, or else he will blow up the classroom.
The culprit fingered by Hiiragi is Takechi, who insists on his innocence. In addition, security camera footage reveals a suspicious man being captured on the day of Reina's death.
The students, thinking that the truth about the fake video has finally come out, appeal to Hiiragi to release them. However, Hiiragi tells them that there is still a secret to be revealed, and issues the next challenge.
A few years later, on March 9, the students, who have moved on with their lives, visit the classroom again for the third anniversary of the death of Mr. Hiiragi.
