After School Lesson

After School Lesson (補習 hoshū; translated Detention in the original japanese release) is an execution in Danganronpa: Trigger Happy Havoc, with Makoto Naegi (in the good ending) or Kyoko Kirigiri (in the bad ending) being executed.

Makoto's version
Makoto is in a room filled with school desks. In the center is a large conveyor belt where his desk is located. As he sits there, it goes backwards towards the end of the room. Behind him at the end of the conveyor belt is a large block resembling a trash compactor that slams down every few seconds intending to crush whatever is underneath. Above is a television showing Monokuma's face on it. As his desk moves backwards, Monokuma dressed as a teacher appears in front of him and attempts to teach him a lesson in class (specifically sex ed).

At the last second, the Monokuma on the television is replaced with Alter Ego for a moment. The compactor stops just as Makoto is about to be crushed to death. The conveyor belt keeps moving on and a door in the floor opens. Makoto and the desk then fall backwards through the very large and deep hole in the floor while Monokuma looks on in panic.

Kyoko's version
Kyoko is in a room filled with school desks. In the center is a large conveyor belt where her desk is located. As she sits there, it goes backwards towards the end of the room. Behind her at the end of the conveyor belt is a large block resembling a trash compactor that slams down every few seconds, intending to crush whatever is underneath. Above is a television showing Monokuma's face on it. As her desk moves backwards, Monokuma dressed as a teacher appears in front of her and attempts to teach her a lesson in class, while Kyoko constantly turns her gaze behind her, nervously watching the compactor. Eventually, her desk goes under the compactor, and Kyoko is crushed flat.

This ending is the bad end route in the game, where the surviving students despairingly spend the rest of their lives in the academy. The ending can be achieved by calling out Kyoko's lie in the fifth trial.

Trivia

 * Naegi's and Kirigiri's version have similar but different tracks