Most nights, Roman stays awake to make sure Thomas has enough creativity to muster happy dreams at night so the other sides not to worry about having to make dreams, especially Patton. This causing the prince to gain no sleep at night and to slave through the days, making Thomas become slowly less and less creative by the day and Roman slowly and slowly more sleepier as one would until one day, he cracks and blacks out during a hangout time with the rest of the sides. That's the tea.