A death game (special lesson) begins just before graduation ceremony. Do you have a real friend? Hold someone's hand or die—
RULES:
• Please form pairs.
• Anyone who cannot pair up will be disqualified. Once the disqualified person for
that round is determined, the game proceeds to the next round.
• You cannot pair with the same person twice.
• When the remaining number is even, one person must sit out.
• If a specific student is left unpaired, everyone except that specific student will be
disqualified.
• The last two—or one—remaining will be permitted to attend the graduation
ceremony.
• The lesson will last 60 minutes.
"There has been bullying in this class. This is something that should never be tolerated. Those who bully deserve the death penalty."
Just before graduation day at a certain all-girls high school, their homeroom teacher initiates a special lesson (game). All 27 students are skeptical of this suddenly-begun death game—until the student left unpaired meets a gruesome death triggered by the corsage pinned to their chest.

First-tier students who never doubt they deserve to survive. Second-tier students caught between genuine and false friendships. Third-tier students inhabiting the bottom of the classroom hierarchy with no voice—What is true friendship? What constitutes unconscious bullying through invisible sins? And who will survive to graduate?