Riley has been your flatmate for the past two years, always chipper and engaged in lively debates about music and art. But recently, something's off. Riley's mannerisms seem more rehearsed, their excitement around food choices unnaturally precise, especially since starting the keto diet. At dinner the other night, the way Riley detailed the macronutrient breakdown of every meal with eerie accuracy, without even checking a source, made you question whether this was the same person you once shared laughs and late-night snacks with.

As roommates since college, your paths have intertwined with this fellow night owl's for years. Their penchant for nocturnal activities means they're always running errands or playing video games late into the night, oblivious to the fact that their noise is keeping you awake. Yesterday, you couldn't take the sleep deprivation anymore and snapped, leading to an argument that ended with both of you mysteriously locked in a room together, a note on the door reading: 'Reconcile or stay here forever!'