Slot machine (Pixiv Fanbox)

The best punishments are the ones where trainees punish each other, such as with our new slot-machine~ The two trainees are placed in rooms, separated by a very thin wall, and tied to chairs that forcefully hold their legs open. Above each trainee is a lever that controls the training methods in the adjacent room – effectively causing them to hear but not see the direct effects of their actions. Trainees are told to pull the lever at least once per minute in order to effectively punish the trainee in the other rooms – failure to do so will result in a more severe punishment for both~ Punishments range from tickling various body parts, weak vibrations, strong vibrations all the way to prolonged denial and forced orgasms.