Nocturnal Submission is a story mission in the video game, "South Park: The Fractured But Whole".
Plot details follow.
Go to bed.
Go upstairs to go to bed. Shortly after, your drunk mom will arrive and tell you to eat your food, however she will be intercepted by your dad, who appears high. Both will go into an argument, accidentally revealing that your dinner had been laced with medications. Go back downstairs to appease her. After eating, go back to bed to finish this mission.
Get ready for your biggest mission yet, The Thin White Line.