The contestants in D-Class (2) genuinely thought that they had somehow signed up for a boot camp from h*ll that was run by the literal devil.
They were the poor, innocent souls who were being tricked and tortured, and their torturer was a slim boy wearing a brown tracksuit with the cute face of an animal on the hood and a weird green mask on his face.
The devil in the green mask had been leading the choreography practice for the past several hours, making them redo each 5-second segment until the angle of each person's arm, legs, and even their heads were perfectly aligned.
If he heard a single step or jump that wasn't unified when their foot hit the ground, the whole choreography had to start from the beginning, and he would repeat the dreaded words.
'Again.'
'One more time.'
'Let's keep going.'
'This is the last time I promise.'
