After School Lesson

After School Lesson (Detention in the original japanese release) is an execution in Dangan Ronpa: Academy of Hope and High School Students of Despair, with Makoto Naegi or Kyouko Kirigiri being executed.

Naegi's version
Naegi 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.

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

Kirigiri's version
Kirigiri 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 Kirigiri constantly turns her gaze behind her, nervously watching the compactor. Eventually her desk goes under the compactor, and Kirigiri is crushed flat. This ending is the bad end route in the game, where the surviving students lived despairingly ending ever in their life in the academy, and can be achieved by calling out Kirigiri's lie in the fifth trial.